[Retracted] A Prospective, Randomized, Double-Masked Controlled Clinical Trial of Postoperative Pain after Transepithelial Photorefractive Keratectomy (Trans-PRK)

Table 5

Postoperative pain scores in different cutting time (n = 370 eyes) ().

	Short time (10–33 s)	Long time (34–56 s)	t	value
Pain scores at the end of surgery	2.65 ± 2.1	2.4 ± 2.06	1.17	0.24
Pain scores on first postoperative day	1.9 ± 1.9	1.93 ± 1.99	−0.13	0.89
Pain scores on second postoperative day	0.55 ± 0.91	0.84 ± 1.35	−2.43	0.02
Pain scores on third postoperative day	0.07 ± 0.26	0.24 ± 0.79	−2.77	0.01

Approximate t-test.