Induced Higher-order aberrations after Laser In Situ Keratomileusis (LASIK) Performed with Wavefront-Guided IntraLase Femtosecond Laser in moderate to high Astigmatism

Table 1 Summary statistics (mean ± standard deviation) preoperatively (n = 23), six months postoperatively and results of comparative analysis

Measured outcome	Sphere	Cylinder	MRSE	J ₁₈₀	J ₄₅	UDVA	CDVA	K _steep	K _flat	K _average	CCT
Preop	−2.5 ± 2.5	−3.22 ± 0.59	−4.12 ± 2.55	−0.16 ± 0.92	−0.26 ± 1.36	−0.94 ± 0.35	+0.01 ± 0.09	44.80 ± 1.56	42.16 ± 1.49	43.48 ± 1.47	547.00 ± 21.65
Postop	+0.04 ± 0.48	−0.72 ± 0.46	−0.31 ± 0.56	−0.03 ± 0.25	−0.02 ± 0.35	−0.04 ± 0.07	−0.00 ± 0.02	39.97 ± 2.18	39.06 ± 2.01	39.51 ± 2.08	464.20 ± 48.07
Post-Pre	+2.55 ± 2.65	+2.52 ± 0.69	+3.82 ± 2.82	+0.13 ± 0.94	+0.27 ± 1.39	+0.90 ± 0.35	−0.01 ± 0.09	−4.83 ± 2.36	−3.11 ± 1.93	−3.97 ± 2.12	−82.74 ± 41.45
P value	<0.0001	<0.0001	<0.0001	0.51	0.35	<0.0001	0.48	<0.0001	<0.0001	<0.0001	<0.0001

MRSE mean refraction spherical equivalent, J ₁₈₀ and J ₄₅ Jackson cross cylinder vector components at 180° and 45° respectively, CDVA unaided distance visual acuity, CDVA corrected distance visual acuity, K keratometry, CCT central corneal thickness, Pre preoperative and postop = postoperative

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