Relative contribution of central and peripheral aberrations to overall high order corneal wavefront aberration

Marco Lombardo, Giuseppe Lombardo, Michele Manzulli, Marino Palombi, Sebastiano Serrao

Research output: Contribution to journalArticlepeer-review

Abstract

PURPOSE: To analyze the influence of specific combinations of corneal high order aberrations on the optical image quality of the cornea before and after photorefractive keratectomy (PRK) for low to high myopia and myopic astigmatism. METHODS: Corneal topography was obtained for 80 eyes that underwent PRK using a scanning-spot excimer laser. The eyes were subdivided into three groups according to the preoperative refraction. The topographical data were imported into a custom software program that combined the Zernike high order terms having the same sign and angular frequency up to seventh order for 4-mm and 6-mm pupils, ie, coma and spherical aberrations, and midperipheral and peripheral high order aberrations. RESULTS: Photorefractive keratectomy induced a significant amount of the root-mean-square (RMS) values of the combinations of midperipheral and peripheral high order aberrations over the smaller pupil size for deeper myopic ablations (P

Original languageEnglish
Pages (from-to)656-664
Number of pages9
JournalJournal of Refractive Surgery
Volume22
Issue number7
Publication statusPublished - Sep 2006

ASJC Scopus subject areas

  • Ophthalmology

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