Table 2 Comparison of anterior corneal elevation values by fitting the corneal shape to a best-fit sphere or best-fit toric ellipsoid reference surface between eyes that underwent combined transepithelial photorefractive keratectomy and accelerated corneal collagen cross-linking and transepithelial photorefractive keratectomy alone

 Ant. elevation (μm, BFS)

–3.59±1.04

9.82±6.76

13.41±6.42

<.001

–3.35±1.17

11.55±5.21

14.90±4.83

<.001

.123

 Ant. elevation (μm, BFTE)

–0.27±1.17

12.27±5.32

12.54±6.42

<.001

–0.20±1.13

11.78±5.33

11.98±5.07

<.001

.524

 Ant. elevation (μm, BFS)

4.38±1.62

–9.19±7.33

–13.57±7.26

<.001

4.08±1.65

–10.36±5.95

–14.44±5.87

<.001

.442

 Ant. elevation (μm, BFTE)

0.78±1.75

–10.85±6.76

–11.63±6.60

<.001

0.79±1.52

–10.86±6.64

–11.65±6.57

<.001

.988

 Ant. elevation (μm, BFS)

13.29±5.39

20.23±6.74

6.94±7.23

<.001

9.36±4.72

17.34±5.12

7.98±5.05

<.001

.320

 Ant. elevation (μm, BFTE)

2.78±4.13

13.73±4.05

10.95±5.54

<.001

2.43±1.27

12.79±4.03

10.36±4.22

<.001

.500