2.1.- Standardized Alpins' terminology for standard vector analysis
2.2.- Description of TIA, SIA and Angle Error Terms
2.2.1.- (RAT) Transposing Refractions with "transRx" to work in a standardized manner with Positive Cylinder
2.2.2.- (RAT) Convert Preoperative Measured Astigmatism to TIA with "pre2TIA".
2.3.- Statistical error when including both eyes and Magnitude of Error
2.3.1.- (RAT) Flipping of astigmatism data to avoid errors in mixing right and left eyes
2.4.- Golfer's analogy to explain SIA, TIA and DV
2.5.- Algorithm to understand Alpins analysis of astigmatism
2.6.- Example SIA in Clear Corneal Incision with Graphical Method and Descriptive Statistics
2.6.1.- (RAT) Decomposition of Astigmatism into its Cartesian Components with "vect2comp"
2.6.2.- (RAT) Astigmatism Recomposition in Polar coordinates with "comp2vect".
2.7.- Treatment to Reapply to correct Residual or Vector Difference
2.8.- Nomogram Considerations and Correction Limitations on the TIA
2.9.- Flattening effect and Torque, flattening and torsion effects on target vector
2.9.1.- (RAT) Calculation of the flattening effect on the curved meridian with "flatteningE".
2.9.2.- (RAT) Calculation of the force that could vary the meridian of the TIA with "torqueE".