Table 2.
Postoperative comparison of vision and refractive parameters of consecutive eyes that underwent deep anterior lamellar keratoplasty (fluid dissection) or penetrating keratoplasty for keratoconus.
| PKP Mean ± SD (min–max) |
DALK Mean ± SD (min–max) |
Test | P | |
|---|---|---|---|---|
| UCVA | 0.88 ± 0.55 | 0.86 ± 0.47 | t | >0.05 |
| (LogMAR) | (0.2–1.5) | (0–1.5) | ||
|
| ||||
| BSCVA | 0.18 ± .18 | 0.2 ± 0.21 | U | >0.05 |
| (LogMAR) | (0–0.7) | (0-1) | ||
|
| ||||
| MRSE | −2.65 ± 3.2 | −4.31 ± 3.55 | U | >0.05 |
| (D) | (−8–5) | (−11.0–3.25) | ||
|
| ||||
| MRC | −3.96 ± 2.93 | −3.99 ± 2.93 | U | >0.05 |
| (D) | (0–10.5) | (0–7.5) | ||
|
| ||||
| RMS 3 mm | 1.46 ± 0.72 | 0.91 ± 0.41 | t | >0.05 |
| (D) | (0.52–3.15) | (0.21–1.55) | ||
|
| ||||
| RMS 5 mm | 2.46 ± 1.53 | 1.7 ± 0.84 | U | >0.05 |
| (D) | (0.89–6.39) | (0.42–3.15) | ||
|
| ||||
| SimK1 | 46.16 ± 2.43 | 48.32 ± 2.68 | t | >0.05 |
| (D) | (43.38–51.53) | (43.49–53.07) | ||
|
| ||||
| SimK2 | 41.74 ± 2.29 | 43.86 ± 2.66 | t | >0.05 |
| (D) | (36.93–44.41) | 3(9.2–48.98) | ||
|
| ||||
| Kcyl | 4.42 ± 3.07 | 4.31 ± 2.76 | U | >0.05 |
| (D) | (0.89–11.71) | (1.31–9.94) | ||
UCVA = uncorrected visual acuity; BSCVA = best spectacle-corrected visual acuity; MRSE = mean refractive spherical equivalent; MRC = mean refractive cylinder; SimK1 = simulated K value at steep meridian; SimK2 = simulated K value at flat meridian; Kcyl = difference between steep and flat K values; RMS = root mean square; DALK = deep anterior lamellar keratoplasty (fluid dissection); PKP = penetrating keratoplasty; wavefront values are presented in t = T-test and U = Mann–Whitney U test. P < 0.05 is statistically significant.