TY - JOUR
A1 - Padmanabhan, Prema
A1 - Basuthkar, Subam
A1 - Joseph, Roy
T1 - Ocular aberrations after wavefront optimized LASIK for myopia
Y1 - 2010/7/1
JF - Indian Journal of Ophthalmology
JO - Indian J Ophthalmol
SP - 307
EP - 312
VL - 58
IS - 4
UR - https://journals.lww.com/ijo/pages/default.aspx/article.asp?issn=0301-4738;year=2010;volume=58;issue=4;spage=307;epage=312;aulast=Padmanabhan
DO - 10.4103/0301-4738.64139
N2 - Purpose: To study the change in ocular aberrations after wavefront optimized (WFO) laser in situ keratomileusis ( Lasik ) for correction of myopia and to analyze causative factors that may influence them. Materials and Methods: This was a prospective case series. WFO Lasik was performed for the correction of myopia, using the hansatome (Bausch and Lomb) microkeratome to create the flap and the Allegretto laser (Wavelight Technologie) to perform the ablation. The Allegretto wave analyser (Tscherning-type) measured the ocular aberrations prior to Lasik , one month and six months postoperatively. Results: The mean age of the 59 patients included in the study was 25±5.64 years and the mean spherical equivalent of the 117 eyes that underwent Lasik0 was -5.33±1.22 preoperatively and -0.21±0.38 postoperatively. Hundred and two eyes of 117 (87%) achieved uncorrected visual acuity (UCVA) of 20/20 or better after WFO Lasik and 104 of 117 eyes (89%) were within ±0.5D of the attempted refractive correction. There was a 1.96-fold increase in total root-mean-square of higher order aberrations. Induced changes in seven of the 22 higher order Zernike terms showed a significant linear correlation with the refractive correction attempted. Larger ablation zones induced less spherical aberration. Conclusion: In spite of an excellent visual outcome, WFO Lasik induces significant higher order aberrations. Large ablation zones reduce the induction of spherical aberration.
ER -