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

Table 3

Postoperative comparison of ocular (whole eye) aberrometry and optical quality of consecutive eyes that underwent deep anterior lamellar keratoplasty (fluid dissection) or penetrating keratoplasty for keratoconus.

Aberrations	PKP; Mean ± SD; (min–max)	DALK; Mean ± SD; (min–max)	Test
HOA	1.73 ± 1.13	1.59 ± 0.61	t	>0.05
(μm)	(1.018–4.725)	(0.173–2.763)
Coma	1.35 ± 0.99	0.92 ± 0.52	U	>0.05
(μm)	(0.122–3.805)	(0.126–1.752)
Trefoil	1.27 ± 1.29	0.97 ± 0.46	U	>0.05
(μm)	(0.236–3.908)	(0.057–1.913)
Tetrafoil	0.45 ± 0.25	0.41 ± 0.19	t	>0.05
(μm)	(0.159–0.973)	(0.111–0.79)
Spherical like	0.55 ± 0.28	0.52 ± 0.35	U	>0.05
(μm)	(0.127–0.867)	(0.061–1.325)
HOAst	0.33 ± 0.11	0.27 ± 0.1	t	>0.05
(μm)	(0.127–0.498)	(0.069–0.486)
PSF	4.08e−03 ± 2.84e−03	7.92e−03 ± 8.34e−03	U	>0.05
(Strehl ratio)	(0.001–0.01)	(0.002–0.042)
MTF	8.39e−02 ± 1.81e−02	0.1 ± 3.06e−02	t	>0.05
(A/D)	(0.065–0.121)	(0.075–0.193)

HOA = higher-order aberrations; HOAst = high-order astigmatism; PSF = point spread function; MTF = modulation transfer function; DALK = deep anterior lamellar keratoplasty (fluid dissection); PKP = penetrating keratoplasty; t = T-test; U = Mann–Whitney U test. is statistically significant.