Table 1.

Demographics and baseline characteristics

	PRK (n=100 eyes of 50 patients)			tPRK (n=100 eyes of 50 patients)
Age (years), mean ± SD	27.2 ± 3,3			27.7 ± 3.4
Gender, n
Male	16			20
Female	34			30
	Right eyes	Left eyes	All eyes	Right eyes	Left eyes	All eyes
Refractive error (D), mean ± SD,
Sphere	-3.29 ± 1.20	-3.20 ± 1.20	-3.24 ± 1.20	-2.73 ± 0.98	-2.81 ± 1.02	-2.77 ± 1.00
Cylinder	-0.72 ± 0.67	-0.70 ± 0.65	-0.71 ± 0.65	0.65 ± 0.61	-0.64 ± 0.56	-0.64 ± 0.58
UCDVA (decimal), mean ± SD	0.21 ± 0.09	0.21 ± 0.09	0.21 ± 0.09	0.22 ± 0.08	0.22 ± 0.07	0.22 ± 0.08
BCDVA (decimal), mean ± SD	1.17 ± 0.18	1.18 ± 0.17	1.17 ± 0.18	1.10 ± 0.15	1.12 ± 0.15	1.11 ± 0.15

BCDVA best corrected distance visual acuity, D diopter, UCDVA uncorrected distance visual acuity, PRK photorefractive keratectomy, tPRK transepithelial photokeratectomy, SE spherical equivalent, SD standard deviation