Table 1.

Baseline and 3-month postoperative parameters in arm A (n = 39 bilateral cases) and arm B (n = 33 bilateral cases)

		Arm A			Arm B
		tPRK	mPRK	P-value*	tPRK	aaPRK	P-value*
UDVA (logMAR)	Baseline	1.37 ± 0.35	1.33 ± 0.36	0.03	1.46 ± 0.31	1.39 ± 0.33	0.008
	Postoperative	0.02 ± 0.04	0.02 ± 0.04	0.71	0.02 ± 0.04	0.01 ± 0.02	0.72
BCVA (logMAR)	Baseline	0.001 ± 0.001	0.003 ± 0.016	0.31	0.00 ± 0.01	0.00 ± 0.00	0.33
	Postoperative	0.01 ± 0.04	0.02 ± 0.03	0.17	0.01 ± 0.02	0.00 ± 0.00	0.80
SE (D)	Baseline	−4.52 ± 1.26	−4.36 ± 1.31	0.08	−4.55 ± 1.14	−4.33 ± 1.16	0.14
	Postoperative	0.27 ± 0.42	0.29 ± 0.37	0.67	0.33 ± 0.47	0.26 ± 0.36	0.27
Sphere (D)	Baseline	−4.02 ± 1.16	−3.78 ± 1.24	0.01	−4.03 ± 1.17	−3.76 ± 1.10	0.06
	Postoperative	0.47 ± 0.39	0.47 ± 0.38	0.92	0.52 ± 0.48	0.49 ± 0.34	0.91
Cylinder (D)	Baseline	−1.01 ± 0.77	−1.15 ± 0.77	0.05	−1.03 ± 0.82	−1.14 ± 0.74	0.30
	Postoperative	−0.41 ± 0.30	−0.33 ± 0.20	0.13	−0.36 ± 0.29	−0.48 ± 0.32	0.07

tPRK Transepithelial photorefractive keratectomy, mPRK Mechanical PRK, aaPRK Alcohol-assisted PRK, UDVA Uncorrected distance visual acuity, CDVA Corrected distance visual acuity, SE Spherical equivalent, D Diopter

*Paired t test

Data are presented as Mean ± SD