Femtosecond thin-flap laser assisted in situ keratomileusis for correction of post-penetrating keratoplasty ametropia: long-term outcome

Table 3 Refractive outcome of eyes undergoing hyperopic correction

Variable	Pre (N = 7)		Month 12 (N = 7)		P	Month 81 (N = 5)		P From baseline
Variable	Mean ± SD	Median	Mean ± SD	Median		Mean ± SD	Median	P From baseline
Sphere	2.89 ± 1.8	2.75	− 0.07 ± 0.2	0	0.001†	0.75 ± 1.4	0.25	0.001†
Cylinder	-5.30 ± 0.9	-6.00	-1.50 ± 0.9	-1.5	0.001†	-4.15 ± 2.56	-4.00	0.32†
SE	0.25 ± 1.7	0.50	-0.82 ± 0.3	− 0.75	0.04†	-1.30 ± 1.2	-1.00	0.04†
CDVA	0.24 ± 0.11	0.22	0.18 ± 0.16	0.15	0.03‡	0.18 ± 0.06	0.22	0.03‡
UDVA	0.49 ± 0.14	0.52	0.32 ± 0.11	0.3	0.04 ‡	0.34 ± 0.08	0.39	0.45‡

CDVA: corrected distance visual acuity; UDVA: Uncorrected distance visual acuity. † Based on paired t-test. ‡ Based on Wilcoxon singed-rank test. SD: Standard deviation; SE: Spherical equivalent

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