Interocular high-order corneal wavefront aberration symmetry.

Abstract

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.

• Authors: Marco Lombardo, Giuseppe Lombardo, Sebastiano Serrao
• Journal: Journal of the Optical Society of America. A, Optics, image science, and vision (J Opt Soc Am A Opt Image Sci Vis) Vol. 23 Issue 4 Pg. 777-87 (Apr 2006) ISSN: 1084-7529 [Print] United States
• PMID: 16604757 (Publication Type: Clinical Trial, Journal Article)

Topics

• Adult
• Corneal Topography (methods)
• Diagnosis, Computer-Assisted (methods)
• Female
• Humans
• Lasers, Excimer
• Male
• Middle Aged
• Myopia (diagnosis, surgery)
• Photorefractive Keratectomy (methods)
• Prognosis
• Refractometry (methods)
• Treatment Outcome