Interocular high-order corneal wavefront aberration symmetry.
The interocular symmetry of the high-order corneal wavefront aberration (WA) in a population of myopic eyes was analyzed before and after photorefractive keratectomy (PRK). The preoperative and one-year postoperative corneal aberration data (from third to seventh Zernike orders) for 4- and 7-mm pupils from right and left eyes were averaged after correcting for the effects of enantiomorphism to test for mirror symmetry. Also, the mean corneal point-spread function (PSF) for right and left eyes was calculated. Preoperatively, a moderate and high degree of correlation in the high-order corneal WA between eyes was found for 4- and 7-mm pupils, respectively. Myopic PRK did not significantly change the interocular symmetry of corneal high-order aberrations. No discernible differences in the orientation PSF between eyes were observed one year after surgery in comparison with the preoperative state over the two analyzed pupils.
Lombardo
Marco
M
Department of Experimental and Clinical Medicine, University Magna Graecia, Viale Europa, Catanzaro, Italy. mflombardo@libero.it
Lombardo
Giuseppe
G
Serrao
Sebastiano
S
D000328:Adult; D019781:Corneal Topography / Q000379:methods*; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D005260:Female; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000175:diagnosis* / Q000601:surgery*; D018903:Photorefractive Keratectomy / Q000379:methods*; D011379:Prognosis; D012031:Refractometry / Q000379:methods*; D016896:Treatment Outcome