Table 1.
Preoperative and postoperative mean data of the patients who had simultaneous topography-guided PRK and CXL after ELLK
| Preop (n = 14) | 3 months (n = 14) | 6 months (n = 14) | 12 months (n = 12) | 24 months (n = 6) | |
|---|---|---|---|---|---|
| UDVA (decimal) | |||||
| Mean ± SD | 0.07 ± 0.07 | 0.17 ± 0.19 | 0.23 ± 0.14 | 0.22 ± 0.15 | 0.20 ± 0.17 |
| Range | 0.01, 0.2 | 0.1, 0.3 | 0.1, 0.4 | 0.1, 0.4 | 0.1, 0.4 |
| P value | 0.216 | 0.019 | 0.037 | 0.109 | |
| CDVA (decimal) | |||||
| Mean ± SD | 0.4 ± 0.27 | 0.50 ± 0.25 | 0.54 ± 0.25 | 0.56 ± 0.16 | 0.47 ± 0.15 |
| Range | 0.1, 0.7 | 0.3, 0.9 | 0.3, 1 | 0.3, 0.7 | 0.3, 0.6 |
| P value | 0.486 | 0.334 | 0.231 | 0.690 | |
| MRSE (D) | |||||
| Mean ± SD | −6.11 ± 2.48 | −0.35 ± 1.85 | −0.89 ± 2.11 | −0.79 ± 1.69 | −1.5 ± 2.18 |
| Range | −9.50, −2.50 | −3.0, +1.0 | −3.0, +1.0 | −2.8, +1.0 | −3.0, +1.0 |
| P value | <0.001 | 0.001 | 0.001 | 0.024 | |
| Keratometric Astigmatism (D) | |||||
| Mean ± SD | 5.57 ± 3.52 | 5.25 ± 2.76 | 5.16 ± 2.88 | 5.02 ± 2.13 | 3.40 ± 3.29 |
| Range | 0.8, 11.2 | 0.9, 8.7 | 0.8, 8.9 | 0.8, 8.9 | 0.8, 7.1 |
| P value | 0.977 | 0.816 | 0.745 | 0.390 | |
| Corneal thickness (μm) | |||||
| Mean ± SD | 581 ± 84.6 | 465 ± 89.6 | 471 ± 79.1 | 470 ± 78.2 | 475 ± 79.6 |
| Range | 497, 739 | 409, 578 | 414, 596 | 412, 596 | 415, 598 |
| P value | 0.028 | 0.033 | 0.033 | 0.103 | |
| ECD (cells/mm2) | |||||
| Mean ± SD | 2109 ± 155 | 2074 ± 110 | 2083 ± 119 | 2092 ± 113 | 2092 ±108 |
| Range | 1945, 2376 | 1937, 2382 | 1928, 2401 | 1935, 2375 | 1940, 2394 |
| P value | 0.171 | 0.429 | 0.488 | 0.580 | |
| Corneal endothelial CoV (SD cell area/mean cell area) | |||||
| Mean ± SD | 26 ± 7 | 29 ± 8 | 28 ± 7 | 27 ± 5 | 28 ± 5 |
| Range | 24, 29 | 23, 33 | 24, 32 | 23, 32 | 23, 33 |
| P value | 0.276 | 0.438 | 0.529 | 0.443 |
Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity; MRSE, manifest refractive spherical equivalent; ECD, Endothelial cell density; CoV, Coefficient of variation.