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Table 2 Postoperative results

From: Early clinical outcomes and comparison between trans-PRK and PRK, regarding refractive outcome, wound healing, pain intensity and visual recovery time in a real‐world setup

 

PRK (n=100 eyes)

tPRK (n=100 eyes)

P value*

Right eyes

Left eyes

All eyes

Right eyes

Left eyes

All eyes

UCDVA (decimal), mean ± SD

 Day 4

0.53 ± 0.09

0.53 ± 0.09

0.53 ± 0.09

0.73 ± 0.17

0.71 ± 0.17

0.72 ± 0.17

< 0.001

 Day 7

0.62 ± 0.09

0.63 ± 0.08

0.63 ± 0.08

0.87 ± 0.19

0.84 ± 0.17

0.86 ± 0.18

< 0.001

 6w

1.09 ± 0.07

1.1 ± 0.07

1.1 ± 0.07

1.1 ± 0.071

1.1 ± 0.07

1.1 ± 0.07

> 0.05

BCDVA (decimal), mean ± SD, 6w

1.21 ± 0.17

1.21 ± 0.16

1.21 ± 0.16

1.18 ± 0.15

1.18 ± 0.16

1.18 ± 0.15

> 0.05

Refractive error (D), mean ± SD, 6w

 Sphere

0.34 ± 0.28

0.30 ± 0.27

0.32 ± 0.27

0.22 ± 0.28

0.23 ± 0.27

0.21 ± 0.30

> 0.05

 Cylinder

- 0.24 ± 0.13

- 0.25 ± 0.17

- 0.23 ± 0.14

-0.25 ± 0.26

-0.27 ± 0.32

- 0.21 ± 0.21

> 0.05

SE off target

0.13 ± 0.28

0.10 ± 0.28

0.12 ± 0.28

0.03 ± 0.21

0.03 ± 0.21

0.03 ± 0.21

> 0.05

Pain Score (0-15), mean ± SD

10.4 ± 1.37

11.16 ± 1.42

10.8 ± 1.44

5.80 ± 3.00

5.00 ± 2.70

5.4 ± 2.84

< 0.0001

Epithelial healing (hours), mean ± SD

60.2 ± 8.02

58.0 ± 5.15

59.10 ± 6.79

47.12 ± 9.22

44.40 ± 9.58

45.76 ± 9.46

< 0.0001

  1. 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, w weeks
  2. *p-value refers to comparison of PRK (all eyes) and tPRK (all eyes)