Journal of Ophthalmology

Research Article

Comparison of Two Toric IOL Calculation Methods

Table 5

Vector analysis for target-induced astigmatism (TIA), total surgically induced astigmatism (TSIA), and the difference vector (DV) including subgroup analysis for with-the-rule (WTR), against-the-rule (ATR), and oblique preoperative astigmatism.
Target-induced astigmatismDifference vectorTotal surgically induced astigmatism
All patients
()		1.88;
85°		1.38;
86°		0.78;
99°
WTR
()		2.44;
91°		0.90;
76°		2.32;
98°
ATR
()		2.48;
88°		1.29;
99°		1.69;
79°
TIA refers to the preoperative astigmatism of the patient’s eye in manifest refraction. TSIA refers to the amount of corrected astigmatism in surgery (induced by corneal incisions and toric IOL). DV refers to the residual postoperative astigmatism of the patient’s eye.