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Table 4 Mean changes in keratoconus parameters over 12-month follow-up (n = 31, x ± s)

From: Topography-guided corneal surface laser ablation combined with simultaneous accelerated corneal collagen cross-linking for treatment of keratoconus

 

Preoperative

1-month

6-month

12-month

F

P

SIf (D)

5.65 ± 3.12

3.64 ± 3.20*

3.62 ± 2.66*

3.30 ± 2.82*

21.950

< 0.001

KVf (µm)

30.32±12.62

31.00±13.89

27.97±12.66*#

26.77±12.23*#&

19.741

< 0.001

BCVf (μm)

2.93±1.29

2.88±1.48

2.47±1.48*#

2.49±1.25*#

8.357

< 0.001

ThkMin (μm)

465 ± 24

387 ± 34*

400 ± 32*#

414 ± 35*#&

75.081

< 0.001

  1. Abbreviations: SIf curvature symmetry index front; KVf keratoconus vertex front; BCV Baiocchi Calossi Versaci index front; ThkMin thinnest corneal thickness
  2. * significant difference compared with preoperative baseline (P < 0.05)
  3. # significant difference compared with postoperative 1-month (P < 0.05)
  4. & significant difference compared with postoperative 6-month (P < 0.05)