Quality of Vision after Deep Anterior Lamellar Keratoplasty (Fluid Dissection) Compared to Penetrating Keratoplasty for the Treatment of Keratoconus

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
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. is statistically significant.