Table 5.

Mean of Aberrations After Six Months

Parameter	PRK	Femto-LASIK	P value
Mean difference HOA 5 mm (µm) ± SD	0.04±0.14	-0.01±0.16	0.06
Mean difference HOA 6 mm (µm) ± SD	0.14±0.26	0.09±0.27	0.26
Mean difference Sph A. 5 mm (µm) ± SD	0.00±0.07	0.00±0.03	0.55
Mean difference Sph A. 6 mm (µm) ± SD	0.06±0.13	0.03±0.08	0.12

HOA = Higher order aberration; Sph A.= spherical aberration; A= aberration