Table 2 Refractive and tomographic changes after transepithelial re-crosslinking.

From: Safety and efficacy of repeated crosslinking assisted by transepithelial double-cycle iontophoresis in keratoconus progression after primary corneal crosslinking

 

Before re-crosslinking

3 months

6 months

12 months

24 months

(n = 21)

Mean ± SD

Mean ± SD

p

Mean ± SD

p

Mean ± SD

p

Mean ± SD

p

UCVA

1.02 ± 0.32

1.03 ± 0.32

1.000

1.07 ± 0.38

0.524

1.04 ± 0.35

1.000

1.03 ± 0.36

1.000

BCVA

0.34 ± 0.09

0.31 ± 0.11

1.000

0.32 ± 0.13

1.000

0.36 ± 0.14

1.000

0.34 ± 0.13

1.000

Sphere, D

−3.86 ± 2.79

−3.46 ± 1.93

1.000

−3.58 ± 2.17

1.000

−3.63 ± 2.35

1.000

−3.61 ± 2.33

1.000

Cylinder, D

−3.48 ± 1.67

−2.74 ± 1.36

0.178

−2.82 ± 1.42

0.205

−3.04 ± 1.19

0.984

−2.98 ± 1.17

0.654

SE, D

−5.60 ± 2.98

−4,83 ± 2.01

0.619

−4.99 ± 2.29

0.629

−5.15 ± 2.48

1.000

−5.10 ± 2.48

1.000

K1, D

52.25 ± 4.98

52.00 ± 4.93

0.389

52.20 ± 5.18

1.000

52.39 ± 5.40

1.000

52.36 ± 5.40

1.000

K2, D

56.87 ± 4.56

56.20 ± 4.82

0.022

56.21 ± 4.90

0.036

56.55 ± 5.16

1.000

56.50 ± 5.17

1.000

Kmax, D

63.48 ± 6.31

62.45 ± 6.86

0.027

62.44 ± 6.80

0.179

62.59 ± 7.59

1.000

62.59 ± 7.56

1.000

Minimal thickness, μm

409.9 ± 29.7

390.4 ± 32.1

<0.001

404.3 ± 28.5

0.085

405.5 ± 26.9

0.105

405.0 ± 27.4

0.067

EC, cells/mm2

2668 ± 220.0

2642 ± 177.6

1.000

2641 ± 188.7

1.000

2644 ± 192.2

1.000

2644 ± 187.1

1.000

IOP, mm Hg

13.42 ± 2.03

14.00 ± 2.42

1.000

13.49 ± 1.64

1.000

13.39 ± 1.92

1.000

13.45 ± 1.88

1.000

  1. UCVA uncorrected visual acuity, BCVA best corrected visual acuity, SE spherical equivalent, EC endothelial cell, IOP intraocular ocular pressure.