Clinical Study
Epi-Off versus Epi-On Corneal Collagen Cross-Linking in Keratoconus Patients: A Comparative Study through 2-Year Follow-Up
Table 3
Epi-off versus epi-on after 2-year follow-up (mean ± SD).
| | Epi-off | Epi-on | value |
| Mean corneal thickness (µm) | 501.41 ± 21.91 | 495.45 ± 43.16 | 0.10 | K flat (D) | 44.71 ± 3.03 | 46.44 ± 3.67 | 0.01 | K steep (D) | 47.76 ± 3.47 | 49.75 ± 3.47 | 0.01 | Mean K (D) | 46.16 ± 3.15 | 47.82 ± 4.06 | 0.08 | BCVA (logMAR) | 0.22 ± 0.12 | 0.27 ± 0.13 | 0.01 | OSDI© (before and one-month later) | 13.56 ± 2.15 | 11.26 ± 2.12 | 0.02 |
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BCVA: best corrected visual acuity; OSDI: Ocular Surface Disease Index; Student’s t-test for paired values. |