Table 1.
Mean preoperative and postoperative data for patients who had transepithelial corneal collagen cross-linking
| Preoperative (n = 16) | 6 months (n = 16) | 12 months (n = 7) | |
|---|---|---|---|
| UDVA (logMAR) | |||
| Mean ± SD | 0.95 ± 0.45 | 0.61 ± 0.45 | 0.74 ± 0.38 |
| Range | 0.2–1.3 | 0.2–1.3 | 0.1–1.0 |
| P value | 0.015 | 0.295 | |
| CDVA (logMAR) | |||
| Mean ± SD | 0.37 ± 0.27 | 0.33 ± 0.30 | 0.34 ± 0.31 |
| Range | 0.1–1.0 | 0.0–1.0 | 0.0–1.0 |
| P value | 0.695 | 0.817 | |
| MRSE (D) | |||
| Mean ± SD | −3.27 ± 2.83 | −2.97 ± 2.98 | −2.95 ± 2.96 |
| Range | −10.0–0.50 | −11.0–0.25 | −10.5–0.25 |
| P value | 0.772 | 0.870 | |
| Average Sim K (D) | |||
| Mean ± SD | 49.38 ± 3.46 | 46.95 ± 2.99 | 48.37 ± 2.90 |
| Range | 43.6–55.6 | 44.2–53.6 | 44.0–53.4 |
| P value | 0.042 | 0.508 | |
| Kapex (D) | |||
| Mean ± SD | 61.30 ± 7.26 | 56.10 ± 5.20 | 58.21 ± 6.20 |
| Range | 52.0–78.0 | 50.4–75.0 | 50.2–67.3 |
| P value | 0.027 | 0.339 | |
| Corneal thickness (μm) | |||
| Mean ± SD | 369.6 ± 19.2 | 365.4 ± 21.1 | 367.7 ± 21.3 |
| Range | 331–389 | 330–385 | 331–387 |
| P value | 0.579 | 0.826 | |
| ECD (cells/mm2) | |||
| Mean ± SD | 2213.4 ± 105 | 2204.4 ± 110 | 2202.1 ± 108 |
| Range | 1954–2367 | 1939–2379 | 1930–2380 |
| P value | 0.814 | 0.821 | |
| Corneal endothelial CoV (SD cell area/mean cell area) | |||
| Mean ± SD | 28.2 ± 5 | 29.0 ± 8 | 29.1 ± 7 |
| Range | 23–28 | 23–33 | 23–32 |
| P value | 0.737 | 0.728 | |
Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity; IogMAR, logarithm of the minimum angle of resolution; MRSE, manifest refractive spherical equivalent; Kapex, curvature at corneal apex on tangential map; AveSimK, average of simulated keratometry values; ECD, endothelial cell density; CoV, coefficient of variation; SD, standard deviation.