Table 3 Preoperative and postoperative corneal indices in eyes undergoing combined corneal wavefront-guided transepithelial photorefractive keratectomy and accelerated corneal collagen cross-linking after intracorneal ring segment implantation in patients with moderate keratoconus

Kmax (D)

55.35 ± 5.51

53.16 ± 5.39

.001

48.04 ± 3.40

47.87 ± 3.43

.914

47.71 ± 3.47

.143

.389

<.001

<.001

Apex K (D)

55.27 ± 5.30

51.56 ± 6.05

<.001

45.98 ± 4.18

45.53 ± 4.07

.999

45.40 ± 4.00

.999

.999

<.001

<.001

Mean K (D)

46.62 ± 2.87

45.03 ± 2.82

.001

43.16 ± 2.78

42.99 ± 2.83

.999

42.93 ± 2.84

.999

.999

<.001

<.001

ISV

85.48 ± 29.26

76.83 ± 23.09

.365

53.43 ± 17.67

50.78 ± 14.55

.348

50.13 ± 14.28

.167

.999

<.001

<.001

IVA

1.01 ± 0.32

0.87 ± 0.29

.214

0.45 ± 0.26

0.45 ± 0.23

.999

0.44 ± 0.22

.999

.999

<.001

<.001

KI

1.24 ± 0.10

1.18 ± 0.07

.002

1.08 ± 0.07

1.07 ± 0.07

.999

1.05 ± 0.06

.130

.999

<.001

<.001

Pachy (μm)

464.74 ± 31.28

469.96 ± 37.15

.752

412.04 ± 35.33

419.26 ± 31.46

.551

434.61 ± 25.34

<.001

<.001

<.001

<.001