Evaluation of Astigmatic Correction Using Vector Analysis after Combined Femtosecond Laser-Assisted Phacoemulsification and Intrastromal Arcuate Keratotomy

Table 3

Outcomes of vector analysis via the comparison of the preoperative with the postoperative values measured by the autokeratometer.

	Mean, SD
TIA (D)	1.21, 0.52
SIA (D)	0.76, 0.53
DV (D)	0.86, 0.50
ME (D)	−0.46, 0.45
AE (degree)	4.02, 28.7
Absolute AE (degree)	21.7, 19.0
CI	0.62, 0.34
CA	2.48, 2.61
FI	0.45, 0.21
ORA (D)	0.06, 0.47

TIA, target-induced astigmatism; SIA, surgically induced astigmatism; DV, difference vector; ME, magnitude of error; AE, angle of error; Absolute AE, absolute angle of error; CI, correction index; CA, coefficient of adjustment; FI, flattening index; and ORA, ocular residual astigmatism.