Synthesis and Critical Appraisal of the Clinical Evidence  in Patients Implanted with Intraocular Lens


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Cientos de Lentes
Hundreds of Reports

Synthesis of scientific publications carried out since 2010 with critical appraisal using an algorithm that considers up to 192 factors described in the articles.

Resultados clínicos
Clinical Outcomes

Summary of results focused on the patient's interest: visual acuities at different distances, defocus curve, contrast sensitivity, patient reported outcomes, etc.

Comparación rápida
Quick Comparison

The results can be displayed as a list for the variables of interest, facilitating comparison between reports from different authors, lenses, procedures, etc.

Resumen individualizado
Summary of Outcomes

 The results of each study are summarized individually, showing the quality of the evidence for each of the sections evaluated and the overall assessment.

Grouped Evidence
Grouped Evidence

The evidence can be consulted in grouped form for each IOL model. In turn, different categories have been created according to the type of lens or the differentiating characteristics of the study.

To know the Expected Clinical Outcomes

Learning to use the App

What is the meaning of the abbreviations I can find within the App?

Main Abbreviations

  • Enh-Mono: Monofocals with Focus Extension around 1.5 D for 0.3 logMAR in monocular vision
  • FRoF-Bi: Multifocals in which a single near addition has been described by the manufacturer.
  • FRoF-Tri: Multifocal in which two additions of near and intermediate have been described by the manufacturer.
  • EDoF: Depth of field extension about 2.0 D for 0.3 logMAR in monocular vision
  • Mono: Conventional single vision lenses

Secondary Abbreviations

They are added to the above when any of the following clinical variations are present:

  • Toric: The study contains results with toric lenses (Example FRoF-Tri Toric).
  • M&M: Combination of two lenses (Mixed M&M indicates the use of 2 lenses of different categories).
  • MicroM: A major myopic target has been selected in either eye.

Example of concatenation of abbreviations:

Mixed M&M MicroM: Mix-and-Match with two lenses of different categories in which one of the eyes has been programmed with a higher myopic target.

What do the operators "&" and "or" mean when two different lenses appear?
  • The "&" operator means that both lenses have been used one in each eye. For example, "Acufocus IC-8 & Monofocal" indicates that one eye has been operated with "Acufocus IC-8" and the other with "Monofocal". 
  • The "or" operator means that the two lenses have been mixed in the sample (not recommended). For example, "Vivity DFT015 or Toric" indicates that this study contains, without being clearly differentiated, results from the Vivity lens in its spherical or toric version.
What does the numbering that accompanies each item represent?

This is the quality of evidence index of the article, it is calculated in an automated way based on 192 parameters that can be described in the article. As it is an algorithm, it can be improved in future versions, so the evaluation of an article could change with the optimization of the algorithm.

What are the numbers that appear in colored form in the report for each lens on the sides of the quality of evidence index?

The quality index is calculated considering 10 main questions or items. Each of these questions is answered considering the respective parameters of the 192 factors extracted within the article. The colors assigned indicate:

  • Green: The quality assessment question is met in a positive manner.
  • Yellow: The wording of the article does not allow for a clear answer to this question.
  • Red: The quality assessment question is not met in a positive manner.
What is the difference between photic phenomenon and positive dysphotopsia?

How to ask about artifacts that appear around lights may differ between studies.

  • Photic phenomena: Percentage of patients reporting glare, halos or starburst.
  • Positive dyspotopia: Cumulative percentage of patients "Bothered and Very Bothered" by photic phenomena.

Since the presence of photic phenomena does not bother all patients equally, the incidence of photic phenomena is usually higher than the incidence of positive dysphotopsias.

Can I access to PRO on all my devices with a single suscription?

Yes, with just one subscription you will have access to PRO on all your devices as long as they have the same Apple Store user account.  

Terms & Conditions for App users

Use License Agreement


This use license agreement represents a pact between you (the USER) and INDALOFTAL SL (the DEVELOPER), located at Camino de Bobar, 1, 04007 Almería, Spain (Tax ID No. B04570446). This license allows the use of IOLEvidence according to the rules established herein, including restrictions on copying, modifying, or redistributing the application. IOLEvidence is an App for disseminating knowledge about intraocular lenses. Specifications and functionalities are detailed in the Apple App Store.


The DEVELOPER grants the USER a non-exclusive, personal, and non-transferable right to use IOLEvidence. These terms imply that the license is individual, cannot be shared or transferred, and may be granted similarly to other users by the DEVELOPER.

The USER may use the application on any of their devices that use the same Apple Store account. The DEVELOPER owns all intellectual and commercial property rights of the application. Therefore, the USER does not obtain any rights over it beyond use. Specifically, it is not permitted to replicate, enhance, update, create successive versions, adapt, or modify IOLEvidence by reverse engineering, unauthorized distribution, etc.


IOLEvidence can be used for free, but certain functionalities are subject to a paid subscription. The prices of the various subscription modalities are detailed in the Apple App Store. IOLEvidence offers an automatically renewable annual subscription ("PRO"). The subscription allows access and use of the services for one year from the payment of the subscription. The payment will be charged to the USER's Apple Store account after purchase confirmation. It is the USER's responsibility to deactivate their subscription at least 24 24 hours before the end of the current period if they do not wish to renew the subscription. The way of notifying the USER before the automatic renewal of the subscription is carried out under the terms of service of the Apple Store.

The DEVELOPER uses Apple Store services to manage the USER's subscription. The management of subscriptions, including cancellations and refunds, is carried out through the Apple Store, under its terms of service.

The DEVELOPER commits to ensuring that the application is as useful and efficient as possible. For that reason, we reserve the right to make changes to the application or charge for its services, at any time and for any reason. We will never charge you for the app or its services without making it very clear exactly what you are paying for. The scope of the services may depend on the subscription you have. The developer may change, update, suspend, improve, or discontinue aspects of the services.


4.1.- The DEVELOPER shall comply with the following obligations:

  • The DEVELOPER commits to making IOLEvidence an educational tool and support in the constant updating of its users, promoting accuracy and depth in the understanding of topics related to intraocular lenses.
  • The DEVELOPER commits to ensuring the operation of IOLEvidence in accordance with the functionalities published in the Apple App Store. And to support the USER by resolving any reported issues in the next scheduled update of the App, if any. The DEVELOPER strives to resolve issues in scheduled updates, although it cannot commit to a specific timeframe due to the variability of circumstances.
  • The DEVELOPER will take reasonable steps to mitigate technical incidents related to third-party dependent services, although cannot guarantee their complete resolution.
  • At some point, the DEVELOPER may wish to update the application. The application is currently available on iOS and MacOS: system requirements may change, and you may need to download updates if you want to continue using the application.
  • Although the DEVELOPER will do everything possible to update the application to the latest versions of IOS or MacOS, they cannot guarantee previous functionalities in future versions of the App. Similarly, they cannot guarantee that these updates will be compatible with previous versions of IOS or MacOS, nor that the functionalities between different operating systems will be equivalent.

4.2.- Obligations of the USER

    • Given the volume of information handled, it is understandable that occasionally there may be errors made during the process of data extraction or during the search for information by artificial intelligence systems (identified as GPT Experts in the App). It is the responsibility of the IOLEvidence USER to verify the reliability and accuracy of the information provided, by consulting the original sources cited within the application. This recommendation is particularly imperative in cases where the information from IOLEvidence is used in conjunction with artificial intelligence tools or advanced query systems.


    • It is the responsibility of the USER to keep their device and access to the application properly protected. Therefore, we recommend not to jailbreak or hack your device, which is the process of removing the software restrictions and limitations imposed by the official operating system of your device. It could make your device vulnerable to malware/viruses/malicious programs, compromise the security features of your device, and could mean that the application stops working correctly. It is important to understand that jailbreaking or hacking your device can have adverse legal consequences, including loss of warranty and possible violations of the law.


    • The USER must be aware that there are certain things for which the DEVELOPER cannot be held responsible. Certain functions of the application will require that the application have an active Internet connection. The connection can be Wi-Fi, or provided by the USER's mobile network provider, but the DEVELOPER cannot take responsibility for the application not functioning fully if it does not have access to Wi-Fi or a data service.


    • If the USER is using the application outside of a Wi-Fi area, they should remember that their terms of agreement with their mobile network provider will still apply. As a result, the USER's mobile service provider may charge them for the cost of data during the connection while accessing the application or other third-party charges. By using the application, the USER accepts responsibility for such charges, including roaming data charges if they use the application outside of their home territory (i.e., region or country) without disabling data roaming. If the USER is not the bill payer of the device on which they are using the application, it should be noted that we assume the USER has received permission from the bill payer to use the application.


    • In the same vein, the DEVELOPER cannot always take responsibility for the way in which the USER uses the application, for example, they must ensure that their device remains charged; if it runs out of battery and cannot turn on the device to take advantage of the Service, the DEVELOPER cannot accept responsibility.


  • The USER is free to update the application when offered and understands that to update the App it may be necessary to update the operating system of their device. Similarly, they understand that the operation of the App may be affected if they use versions of the operating system not optimized for the version of the App that is installed. If a user decides not to update the application, the DEVELOPER cannot guarantee proper operation or access to certain functionalities.
  • The USER commits to making appropriate use of the App, especially with respect to not infringing the intellectual property rights of the same and to using the services appropriately, for example, not infringing privacy policies by including personal data in any of the services offered in the App.


5.1.- Exclusions of Liability

    • Third-Party Dependence: Regarding the DEVELOPER's responsibility for the use of the application, when using it, it is important to note that although we strive to ensure that it is up-to-date and correct at all times, we rely on third parties to provide us with information so that we can make it available to you. The DEVELOPER accepts no liability for any loss, direct or indirect, that you experience as a result of fully relying on functionalities provided by third parties.


    • Health Decisions Based on Application Information: The DEVELOPER assumes no legal responsibility for health decisions based on IOLEvidence information. All medical decisions should be made by qualified professionals. IOLEvidence is a support tool and does not replace professional medical advice. The IOLEvidence application IS NOT A MEDICAL DEVICE, it is designed to facilitate access to specialized and updated knowledge, and is distinguished for NOT employing algorithms for medical decision-making or diagnostics. Instead, IOLEvidence acts as a means for the dissemination of scientific information, with the purpose of enriching understanding and supporting access to information for its USERS, who may include health professionals, researchers, and students.


    • Limited Warranty of Operation: The DEVELOPER only guarantees the fulfillment of the functionalities and technical specifications of IOLEvidence as advertised. In the event of any non-compliance with these terms and conditions by the DEVELOPER, they will only be liable for a maximum refund amount corresponding to the price paid by the USER for the licensing contract. The USER will use the Apple Store service to request such a refund amount, who will act as a mediator.


    • System Failures and Maintenance: The DEVELOPER will not be responsible for interruptions or failures in the operation of IOLEvidence due to scheduled maintenance, updates, technical emergencies, or failures in telecommunications networks beyond their control.


    • Improper Use by the User: No liability is assumed for damages or losses caused by improper use of the application by the user, including, but not limited to, unauthorized manipulation, jailbreak, or modification of the device.


  • Force Majeure Events: The DEVELOPER is exempt from liability in situations of force majeure, such as natural disasters, armed conflicts, strikes, and other unforeseen and unavoidable events that prevent the fulfillment of their obligations.

5.2.- Maintenance and Availability

    • Regular Updates: The DEVELOPER commits to performing regular updates to ensure the proper functioning and security of the application. However, they cannot guarantee that older versions of the application will be compatible with future updates.


    • Operational Guarantee: Although the DEVELOPER strives to ensure that IOLEvidence is available without interruptions, they cannot guarantee uninterrupted or error-free availability, due to the nature of the Internet and digital technologies.



All data collection, processing, and storage practices are designed to comply with the General Data Protection Regulation (GDPR) and other applicable data protection laws.

The terms of the Privacy Policy published in the App Store or within the App in the Privacy Policy section apply to this license agreement.

The DEVELOPER commits to not collecting personal data from the user through IOLEvidence, ensuring their privacy and confidentiality in accordance with current regulations.

The DEVELOPER uses the following third-party services that may process anonymized user data: 1) Analytics services on how users use IOLEvidence, which allows us to detect and identify improvements to be made in the App. For this, we use TelemetryDeck. 2) Messaging services that allow us to alert users who enable notifications about the contents of IOLEvidence. For this, we use "Firebase Cloud Messaging". 3) Services for searching scientific literature through generative artificial intelligence. For this, we use GPT-Trainer. For detailed information about these third-party services, please review the privacy policy within the App.


The DEVELOPER may update these Terms and Conditions. Therefore, it is recommended that the USER periodically review this page for changes as the DEVELOPER does not have any other means of notification as they do not store personal data of their USERS. The DEVELOPER will notify you of any changes by posting the new Terms and Conditions on this page. These changes are effective immediately after they are posted on this page. Significant changes include, but are not limited to, alterations in the privacy policy, adjustments in user obligations, and modifications in subscription conditions.


This agreement will be terminated due to the general causes established in Spanish and European legislation and, in particular, for the following reasons:


Upon the expiry of its duration as contemplated in the type of subscription chosen by the USER.


For non-compliance with the Terms and Conditions by the DEVELOPER, the USER may request a refund through the Apple Store, the DEVELOPER not being responsible for providing assistance to the USER in this process. Nor for making the refund decision that may depend on the conditions of use of the Apple Store.


If the USER has any doubts or inquiries regarding the terms of this license agreement, they can contact us by sending an email to [email protected]. The DEVELOPER will respond to your inquiries within 72 hours.



Before resorting to the courts, the parties will attempt to resolve any dispute through mediation. In case of not reaching an agreement, the parties will submit to the Courts of Vitoria, according to Spanish legislation. For any discussion or controversy about the interpretation or compliance with this contract, the parties expressly agree to submit to the Courts of Vitoria (Álava) in Spain, expressly waiving their own jurisdiction if they have one, unless Spanish procedural law establishes a different one.


In any case, in accordance with the provisions of Regulation (EU) No. 524/2013 of the European Parliament and of the Council, of May 21, 2013, on the resolution of online consumer disputes and amending Regulation (EC) No. 2006/2004 and Directive 2009/22/EC, we provide the following electronic link to the platform for out-of-court resolution of online disputes:


This document may be a translation of the original License Agreement, which has been drafted in Spanish. Although efforts have been made to ensure the accuracy of this translation, in case of any conflict, ambiguity, or discrepancy in interpretation between this version and the original Spanish version, the Spanish text will always prevail. The original version in Spanish can be found at "" and is considered the official and binding version of the License Agreement. This translation is provided solely for informational and convenience purposes for users who do not speak Spanish.

By accepting these terms and conditions, the USER acknowledges and agrees that they have had the opportunity to review both the Spanish version and this translation, and that their acceptance is based on their understanding of the License Agreement in the original Spanish version.

Privacy Policy

Privacy Policy

Last Version: February 1, 2024


This page informs you of our policies regarding the collection, use, and disclosure of personal data when you use our application ("the APP") and the choices you have associated with that data in compliance with the General Data Protection Regulation (GDPR) (Regulation 2016/679).


The APP has been developed by INDALOFTAL S. L. (the DEVELOPER)
Avenida de Bobar Nº 1, block4 – 6th Spain
Email: [email protected]
Phone number: 950 21 71 71. The DEVELOPER acts as the Owner of any possible personal data collected.


IOLEvidence is an APP for disseminating knowledge about intraocular lenses. The APP does not collect any type of personal data that could identify the USER. It also does not use any features of your device that could be related to your location.


3.1.1.- Processing Modalities

The DEVELOPER will process the USERS' Data appropriately and will adopt the necessary security measures to prevent unauthorized access, disclosure, alteration, or destruction of the Data. The Data processing will be carried out using computers and/or IT tools, following procedures and organizational modalities strictly related to the indicated purposes. In addition to the DEVELOPER, in some cases, certain categories of authorized persons involved in the operation of this APP (administration, sales, marketing, legal department, and system administration) or external contractors providing services to the DEVELOPER (such as external technical service providers, courier companies, hosting companies, IT companies, communication agencies) may have access to the Data, and will be appointed by the DEVELOPER as Data Processors, if necessary. An updated list of these parties may be requested from the DEVELOPER at any time.

3.1.2.- Legal Basis for Processing

The DEVELOPER may process the USERS' Personal Data if one of the following conditions is met:

  1. When the USERS have given their consent for one or more specific purposes. Notice: Under various different legislations, the DEVELOPER may be authorized to process Personal Data until the USER objects to it (“opt-out”) without relying on consent or any other legal basis. However, this will not apply when the processing of Personal Data is subject to European data protection laws;
  2. When the collection of Data is necessary for the performance of a contract between the USER and/or any other pre-contractual obligations thereof;
  3. When processing is necessary for compliance with a legal obligation to which the USER is subject;
  4. When processing is related to a task carried out in the public interest or in the exercise of official authority vested in the DEVELOPER;
  5. When processing is necessary for the purposes of a legitimate interest pursued by the DEVELOPER or a third party.

In any case, the DEVELOPER is at your disposal to clarify the specific legal bases that apply to the processing, and in particular, whether the provision of Personal Data is a statutory or contractual requirement, or a requirement necessary to enter into a contract.

3.1.3.- Place

The Data is processed at the DEVELOPER's operating offices and in any other places where the parties involved in the processing are located. Depending on the USER's location, Data transfers may involve transferring the USER's Data to a country other than their own. To find out more about the place of processing of such transferred Data, USERS can check the section containing details on the processing of Personal Data. USERS are also entitled to learn about the legal basis of Data transfers to a country outside the European Union or to any international organization governed by public international law or set up by two or more countries, such as the UN, and about the security measures taken by the DEVELOPER to safeguard their Data. If any such transfer takes place, USERS can find out more by checking the relevant sections of this document or inquire with the DEVELOPER using the contact information provided in the contact section.

3.1.4.- Retention period

Personal Data shall be processed and stored for as long as required by the purpose they have been collected for. Therefore:

  • Personal Data collected for the purposes of the DEVELOPER’s performance of a contract with the USER shall be retained until such contract has been fully performed.
  • Personal Data collected for the purposes of the DEVELOPER’s legitimate interests shall be retained as long as needed to fulfill such purposes. USERS may find specific information regarding the legitimate interests pursued by the DEVELOPER within the relevant sections of this document or by contacting the DEVELOPER.

The DEVELOPER may be allowed to retain Personal Data for a longer period whenever the USER has given consent to such processing, as long as such consent is not withdrawn. Furthermore, the DEVELOPER may be obliged to retain Personal Data for a longer period whenever required to do so for the performance of a legal obligation or upon order of an authority.

Once the retention period expires, Personal Data shall be deleted. Therefore, the right of access, the right to erasure, the right to rectification and the right to data portability cannot be enforced after expiration of the retention period.


The Data concerning the USER is collected to allow the DEVELOPER to provide its Service, comply with its legal obligations, respond to enforcement requests, protect its rights and interests (or those of its USERS or third parties), detect any malicious or fraudulent activity, as well as the following purposes: Contact management and message sending, and Statistics. USERS can find specific information regarding personal data used for each purpose in the section “Detailed information on the Processing of Personal Data”.

4.1.- Detailed Information on the Processing of Data

The APP only collects the following Anonymized data required by third parties to offer certain services as detailed below:

Push Notifications:

  • Data processed: Firebase installation ID
  • Place of processing: Any of the Google Cloud Platform locations or Google data centers
  • Category of personal data collected under the CCPA: Internet or other electronic network activity information.
  • Purpose of data use: We use the "Firebase Messaging" service to send notifications to the USER, if they have expressly approved the receipt of notifications. Firebase In-App Messaging uses Firebase installation IDs to determine which devices to send messages to. These Firebase installation IDs do NOT personally identify the USER. Firebase installation IDs are different for each app installation. Different applications on the same device have different Firebase installation IDs. Firebase installation IDs identify the installations and the app data linked to those installations.
  • User’s Right to Modify or Delete Data: Deleting and reinstalling all the DEVELOPER's applications on your device will generate a new identifier and cut any connection with the old one.
  • You can consult the privacy policy of Firebase Messaging at this link:

App Usage Analytics:

  • Data processed : IdentifierForVendor
  • Place of processing: Germany
  • Category of personal data collected under the CCPA: Internet or other electronic network activity information.
  • Purpose of data use: We use the "TelemetryDeck" service to store the USER's behavior within the App. This allows us to detect and identify improvements to be made in the App. TelemetryDeck uses Apple's "IdentifierForVendor" API to ensure the USER's privacy. The identifier generated with this method is not linked to any identifiable information or private data of the USER.
  • User’s Right to Modify or Delete Data: Deleting and reinstalling all the DEVELOPER's applications on your device will generate a new identifier and cut any connection with the old one.
  • You can consult the privacy policy of Telemetry Deck at this link:

Scientific Literature Search Using Generative Artificial Intelligence (GPT Experts):

  • Data processed: Questions asked by the USER about scientific literature related to intraocular lenses
  • Place of processing: United States
  • Category of personal data collected under the CCPA: Internet or other electronic network activity information.
  • Purpose of data use: We use the "GPT-Trainer" API for searching scientific literature. The questions asked by the USER through this service will be stored by the DEVELOPER for a period of 30 days in order to detect and identify the knowledge needs of our USERS. It is the responsibility of the USER to make appropriate use of this system and NOT to make irresponsible use of the service, for example, by making individual inquiries about patients or specific clinical cases. By sending questions to the GPT experts, the user agrees that such questions be stored by the DEVELOPER on servers in the United States.
  • You can consult the privacy policy of GPT-Trainer at this link:


USERS may exercise certain rights regarding their Data processed by the DEVELOPER. Specifically, USERS have the right to do the following:

  • Withdraw their consent at any time. USERS have the right to withdraw consent where they have previously given their consent to the processing of their Personal Data.
  • Object to processing of their Data. USERS have the right to object to the processing of their Data if the processing is carried out on a legal basis other than consent. Further details are provided in the relevant section below.
  • Access their Data. USERS have the right to learn if Data is being processed by the DEVELOPER, obtain disclosure regarding certain aspects of the processing, and obtain a copy of the Data undergoing processing.
  • Verify and seek rectification. USERS have the right to verify the accuracy of their Data and ask for it to be updated or corrected.
  • Restrict the processing of their Data. USERS have the right, under certain circumstances, to restrict the processing of their Data. In this case, the DEVELOPER will not process their Data for any purpose other than storing it.
  • Have their Personal Data deleted or otherwise removed. USERS have the right, under certain circumstances, to obtain the erasure of their Data from the DEVELOPER.
  • Receive their Data and have it transferred to another controller. USERS have the right to receive their Data in a structured, commonly used and machine-readable format and, if technically feasible, to have it transmitted to another controller without any hindrance. This provision is applicable provided that the Data is processed by automated means and that the processing is based on the USER's consent, on a contract which the USER is part of or on pre-contractual obligations thereof.
  • Lodge a complaint. USERS have the right to bring a claim before their competent data protection authority.

5.1.- Details about the right to object to processing

Where the processing of Personal Data is for a public interest, in the exercise of official authority vested in the DEVELOPER or due to a legitimate interest of the DEVELOPER, USERS may object to such processing by providing a reason related to their particular situation to justify their objection. USERS should know, however, that if their Personal Data is processed for commercial purposes, they can object to such processing at any time without providing a justification. To find out if the USERS' Personal Data is being processed by the DEVELOPER for commercial purposes, they should consult the relevant sections of this document.

5.2.- How to exercise these rights

Any request to exercise the USER's rights can be directed to the DEVELOPER through the contact details provided in this document. Such requests will be processed by the DEVELOPER free of charge as soon as possible and always within one month.

5.3.- Additional information on the collection and processing of Data

5.3.1.- Legal defense

The USER's Personal Data may be used for the legal defense of the DEVELOPER before a court or in the stages leading to possible legal action arising from improper use of this Application or the related Services.
The USER acknowledges that the DEVELOPER may be required by public authorities to disclose Personal Data.

5.3.2.- Additional information about the USER's Personal Data

In addition to the information contained in this privacy policy, this Application may provide the USER with additional and contextual information concerning particular Services or the collection and processing of Personal Data.

5.3.3.- Information not contained in this privacy policy

Further information regarding the collection and processing of Personal Data may be requested from the DEVELOPER at any time. The contact information is indicated at the beginning of this document.

5.3.4.- Modification of this privacy policy

The DEVELOPER reserves the right to make changes to this privacy policy at any time by notifying USERS through this page and, if possible, through this Site and/or technically and legally possible by directly notifying USERS, in case the DEVELOPER has the necessary contact information for this purpose. It is strongly recommended to check this page often, referring to the date of the last modification listed at the bottom of the page. If the changes affect processing activities performed on the basis of the USER's consent, the DEVELOPER shall, if necessary, obtain a new consent from the USER.


Personal Data (or Data)

Any information that directly, indirectly, or in connection with other information — including a personal identification number — allows for the identification of a natural person.

Usage Data

Information collected automatically by this Application (or third-party services employed by this Application)


The individual using this Application and who is the subject of the Personal Data.

Data Processor (or Data Supervisor)

The natural or legal person, public administration, agency or other body which processes Personal Data on behalf of the Controller, as described in this privacy policy.

Data Controller (or DEVELOPER)

The natural or legal person, public administration, agency or other body, acting alone or jointly with others, which determines the purposes and means of the processing of Personal Data, including the security measures concerning the operation and use of this Application. Unless otherwise specified, the Data Controller is the DEVELOPER of this Application.

This Application

The means by which the Personal Data of the USER is collected and processed.


The service provided by this Application as described in the legal definitions and references (if available) and on this page or application.

European Union (or EU)

Unless otherwise specified, all references made within this document to the European Union include all current member states to the European Union and the European Economic Area.

Legal information

This privacy policy is drafted based on provisions of multiple legislations, including Arts. 13 and 14 of Regulation (EU) 2016/679 (General Data Protection Regulation).

This privacy policy only refers to this Application, unless stated otherwise within this document.


This document may be a translation of the ORIGINAL privacy policy, which has been drafted in Spanish. Although efforts have been made to ensure the accuracy of this translation, in the event of any conflict, ambiguity, or discrepancy in interpretation between this version and the original Spanish version, the Spanish text shall always prevail. The original Spanish version can be found at "" and is considered the official and binding version of the privacy policy. This translation is provided only for informational and convenience purposes for users who do not speak Spanish.

By accepting the terms and conditions of the APP, the USER acknowledges and agrees that they have had the opportunity to review both the Spanish version and this translation, and that their acceptance is based on their understanding of the License Agreement in the original Spanish version.

What Information from Evidence is Synthesized by the App?

Related to the Study

The app processes various information to provide a comprehensive overview of a manuscript focused on intraocular lens (IOL) cases. It first identifies the manuscript using the given IOL case and study identifiers. It then extracts key details such as the authors, title, publication source, year, volume, and pages of publication. Additionally, the app provides the manuscript's URL and indicates whether it is new.

The app also delves into the study's content, analyzing the functional classification, name of the intraocular lens, and the type of study conducted. It evaluates how the lens compares with other lenses and determines if the study is prospective or retrospective. Furthermore, the app assesses the case series to confirm if it is consecutive, including the recruitment timeframe. Finally, it verifies if all patients were included in the clinical trial without losses or if the series was consecutive.

Related to Population Characteristics

The app processes extensive data related to ophthalmological studies. It begins by analyzing the number of subjects included and the number of eyes examined. It considers corneal astigmatism in inclusion criteria and assesses if eyes with comorbidities were included.

The app further evaluates demographic and biometric details, such as the mean and standard deviation (SD) of the sample's age, the percentages of men and women, and the mean and SD of axial length, average keratometry, IOL power, corneal astigmatism, and anterior chamber depth.

Additionally, the app identifies which device was used for pupil measurement and reports the mean and SD of photopic and mesopic pupils for the sample. Lastly, it analyzes the preoperative corrected distance visual acuity and its SD. This comprehensive processing enables the app to provide a detailed understanding of the study's participants and their ocular characteristics, facilitating a thorough analysis of the research conducted.

Related to the Surgical Procedure

The app processes essential information regarding surgical procedures for intraocular lens (IOL) implantation. It identifies the site where the surgery was conducted and the number of surgeons involved. The app also distinguishes between phacoemulsification and femtosecond laser-assisted cataract surgery (femtoemulsification).

Details about the surgical approach are analyzed, including the clear corneal incision size, incision meridian, and any additional corneal incisions.

The app also considers the nomogram followed and the capsulotomy size. Furthermore, the app examines the mean target planned and its standard deviation, the formula and constant used for IOL power calculation, and the biometer utilized in the process. It also determines whether the surgeon planned for micromonovision or emmetropia.

By processing this information, the app enables users to gain a comprehensive understanding of the surgical techniques and planning involved in IOL implantation, thereby facilitating better assessment and comparison of the outcomes..

Related to Procedures' Safety

The app processes crucial data related to postoperative outcomes and complications for intraocular lens (IOL) implantation procedures. It shows the percentage of eyes that experienced a loss of 2 or more corrected distance visual acuity (CDVA) lines, providing insight into the surgical success and potential risks.

Additionally, the app presents the percentage of eyes with a CDVA of less than 0.3 logMAR. This information offers a deeper understanding of the factors contributing to suboptimal visual acuity results post-surgery. The app also evaluates the reported adverse events, presenting users with a comprehensive overview of potential complications and their frequency.

Moreover, it introduces the user to the percentage of eyes that required Nd:YAG (neodymium-doped yttrium aluminum garnet) laser procedures, which are often performed to address posterior capsule opacification following cataract surgery.

By processing these variables, the app offers valuable insights into postoperative outcomes and complications, enabling users to make informed decisions about IOL implantation procedures.

Related to the Efficacy and Predictability of the Intraocular Lens and the Procedure?

The app processes a wide array of visual acuity data at various distances for both monocular and binocular vision, offering a comprehensive understanding of postoperative outcomes in intraocular lens (IOL) implantation procedures. It evaluates far, intermediate, and near distances in meters and centimeters, respectively, and considers follow-up in monocular and binocular vision.

The app analyzes multiple visual acuity aspects, such as uncorrected and corrected distance visual acuity, intermediate visual acuity, and near visual acuity, along with their respective standard deviations.

It also shows the percentage of eyes achieving specific visual acuity benchmarks, such as 20/20 for far and 20/25 for intermediate and near distances, with the best distance correction. Additionally, the app examines residual refractive outcomes, including spherical equivalent and astigmatism, and their standard deviations.

It determines the percentage of eyes within specific diopter ranges, such as 0.50D and 1.0D. Lastly, the app identifies whether the ETDRS chart was used for measuring visual acuity at all distances and the luminance applied during the measurements.

This extensive processing allows users to thoroughly assess visual outcomes and compare the effectiveness of different IOL implantation procedures.

Related to Monocular and Binocular Defocus Curves

The app processes an extensive range of defocus curve data, which is vital in understanding the depth of focus and visual performance of intraocular lenses (IOLs) after implantation. It considers the follow-up period for defocus curves and the distance correction applied during the defocus curve assessment.

The app analyzes defocus values at multiple diopter levels, ranging from 2.0 to -4.0 diopters, providing a comprehensive overview of the IOL's performance under different defocus conditions. This information allows users to evaluate the effectiveness of IOLs in various situations, such as near, intermediate, and far vision.

Additionally, the app takes into account any methods described for bias prevention by memorization. This ensures that the defocus curve data is reliable and minimizes the impact of potential biases on the results.

By processing this extensive defocus curve data, the app enables users to make informed decisions about IOL implantation procedures based on the depth of focus and overall visual performance under various conditions.

Related to the Contrast Sensitivity Function

The app processes a comprehensive range of contrast sensitivity data for both monocular and binocular vision, offering valuable insights into visual performance under various lighting conditions and with or without glare. It considers the test used for contrast sensitivity and the method for selecting the ceiling and floor effect.

For both monocular and binocular vision, the app shows contrast sensitivity measurements at different follow-up periods and with distance correction. It describes photopic and mesopic contrast sensitivity without glare at various spatial frequencies (cycles per degree, cpd) such as 3, 6, 12, and 18 cpd for photopic vision, and 1.5, 3, 6, and 12 cpd for mesopic vision.

Additionally, the app reports contrast sensitivity under glare conditions for both photopic and mesopic vision at the same spatial frequencies.

This comprehensive analysis allows users to understand the impact of intraocular lenses (IOLs) on visual performance under diverse lighting conditions and in the presence of glare, facilitating informed decision-making regarding IOL implantation procedures.

Related to Patient Reported Outcomes?

The app processes a wide range of data related to patient-reported outcomes. The app reports the percentage of patients achieving spectacle independence at far, intermediate, and near distances, providing insights into the effectiveness of IOLs in reducing spectacle dependency.

It also analyzes patient satisfaction levels, encompassing both positive (satisfied or very satisfied) and negative (dissatisfied or very dissatisfied) feedback.

The app examines the percentage of patients experiencing visual disturbances, such as halos, glare, and starbursts, as well as the proportion of those bothered by these phenomena or any other photic occurrences.

Furthermore, the app calculates the percentage of patients who would recommend the procedure, offering insights into overall satisfaction and success. Lastly, it assesses the acceptability of the statistical methods employed, ensuring the reliability of the presented data.

By processing this information, the app allows users to make informed decisions based on patient-reported outcomes and satisfaction levels following IOL implantation procedures.

Common Patients' Questions 

What is the average age for cataract surgery?

According to the clinical studies of intraocular lenses, the average age for cataract surgery is around 66 years, although cataract patients can range from adult patients in their 40s to those in their 90s. The prevalence of cataracts increases with age, making surgery more common among older individuals.

Can intraocular lenses become cloudy?

Yes, intraocular lenses can sometimes become cloudy due to a condition called posterior capsule opacification (PCO). This occurs when lens epithelial cells proliferate and migrate behind the intraocular lens, leading to a cloudy appearance and reduced visual acuity.

Why is vision different in each eye after cataract surgery?

Vision may be different in each eye after cataract surgery due to several factors, including refractive error, astigmatism, ocular comorbidity, or differences in the intraocular lens implanted. Additionally, the healing process can vary between eyes.

What is the scariest complication of cataract surgery?

Some of the scariest complications of cataract surgery include infection, retinal detachment, and vision loss. These complications are very rare, but they can have serious consequences for the patient's vision and eye health if not managed promptly and appropriately.

Why are your eyes still blurry after 2 months of cataract surgery?

Blurry vision after 2 months of cataract surgery could be due to several reasons, such as residual refractive error, corneal astigmatism, posterior capsule opacification, or ocular comorbidities like glaucoma. It is essential to consult with an eye care professional to determine the cause and appropriate treatment.

What is the most common complication of cataract surgery with iol insertion?

The most common complication of cataract surgery with IOL implantation is posterior capsule opacification, which can lead to reduced visual acuity and contrast sensitivity. However, this complication can be managed with a simple laser procedure called YAG capsulotomy.

What is the clinical outcome of lentis comfort and other intraocular lens implantation?

The clinical outcomes of Lentis Comfort intraocular lens can be found in the IOLEvidence Application. All the studies of intraocular lenses have been synthesized to know the expected visual acuities at far distance, intermediate and near, the defocus curve, the contrast sensitivity, satisfaction, dysphotopsia and many other outcomes relevant for the patient.

What are predictors of outcome in patients who underwent cataract surgery?

Predictors of outcomes in patients who underwent cataract surgery include preoperative visual acuity, ocular comorbidities like glaucoma, corneal astigmatism, and the type of intraocular lens implanted (monofocal IOL, multifocal IOL, or toric IOL). Additionally, surgical technique and the patient's general health can influence the outcomes.

How improved is vision after cataract surgery?

Vision is typically significantly improved after cataract surgery, with many patients experiencing corrected distance visual acuity of 20/40 or better. In some cases, patients can achieve 20/20 vision after surgery. However, individual outcomes may vary depending on factors such as the type of IOL implanted, preoperative visual acuity, and any ocular comorbidities.

Is 20/40 vision good after cataract surgery?

A good visual acuity is that achieve patient's expectations and needs. Surgeons can help the patient's to achieve the visual acuity without spectacles according to patient's expectations at far, intermediate and near distances. However, same vision cannot be achieved at all distances without spectacles and therefore the patient should sometimes prioritize the vision at a particular distance.

Will blurry vision go away after cataract surgery?

In most cases, blurry vision will improve after cataract surgery as the eye heals and adjusts to the new intraocular lens. However, some patients may still experience some degree of blurry vision due to factors such as residual refractive error, astigmatism, or ocular comorbidities. It is important to consult with an eye care professional to address any ongoing visual concerns.

Is it bad to wait too long for cataract surgery?

Waiting too long for cataract surgery can result in worsening vision, reduced quality of life, and increased difficulty performing daily tasks. However, the urgency for surgery depends on the severity of the cataract and its impact on the patient's vision and lifestyle. In some cases, delaying surgery may not have significant consequences, but it is crucial to discuss the appropriate timing with an eye care professional.

What is the problem with iol lens implant?

Some potential problems with IOL lens implants include incorrect lens power, which may result in residual refractive error; increased risk of posterior capsule opacification; and reduced contrast sensitivity, particularly with multifocal IOLs. Additionally, some patients may experience glare, halos, or other visual disturbances.

Why is your eyesight getting worse after cataract surgery?

Eyesight may worsen after cataract surgery due to several factors, such as residual refractive error, posterior capsule opacification, or the development of other ocular conditions like glaucoma. It is essential to consult with an eye care professional to determine the cause and appropriate treatment.

How long does intraocular lens last after cataract surgery?

Intraocular lenses are designed to last a lifetime after cataract surgery. They are made of durable materials that do not degrade over time, and complications related to the lens itself are relatively rare. However, other factors, such as the development of posterior capsule opacification, may affect vision and require additional treatment.

What is the benefit of intraocular lens?

The primary benefit of intraocular lenses is the restoration of clear vision after cataract surgery. IOLs replace the eye's natural lens, which has become cloudy due to cataract formation, providing improved visual acuity and, in many cases, reducing the need for glasses. Additionally, certain types of IOLs, such as multifocal or toric IOLs, can correct presbyopia and astigmatism, respectively, further enhancing the patient's vision.

What are the pros and cons of IOL lenses?

Pros of IOL lenses include improved visual acuity after cataract surgery, potential spectacle independence for distance, intermediate, and near vision (depending on the type of IOL), and a long-lasting solution for clear vision. Cons include potential complications such as residual refractive error, glare or halos, reduced contrast sensitivity, and the possibility of needing additional corrective eyewear for certain tasks.

What is the life expectancy of an intraocular lens?

The life expectancy of an intraocular lens is designed to be lifelong. IOLs are made from durable materials that do not degrade over time, ensuring long-lasting clear vision after cataract surgery. While complications related to the lens itself are relatively rare, factors such as posterior capsule opacification may affect vision and require additional treatment.

Can you expect 20/20 vision after cataract surgery?

It is possible to achieve 20/20 vision after cataract surgery, but individual outcomes may vary depending on factors such as the type of IOL implanted, preoperative visual acuity, and any ocular comorbidities. In many cases, patients can expect significant improvement in their vision after surgery, with some achieving 20/20

Learn to Compare Procedures

We show you an example of how you can use the App to compare different interventional procedures, such as Micro-monovision with EDoF lens versus implantation of a trifocal intraocular lens with emmetropia oriented target.

Influence of Astigmatism

Influence of Spherical Equiv.

Crystalline lens and Cataracts

Variability in Studies

Demographic Data