| Título: | Correlation between Corneal Topographic Indices and Higher-Order Aberrations in Keratoconus |
| Autores: |
Sepehr Feizi; Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran Bahram Einollahi Alireza Raminkhoo |
| Fecha: | 2013-07-09 |
| Publicador: | Ophthalmic Research Center |
| Fuente: |
Ver documento |
| Tipo: | |
| Tema: | No aplica |
| Descripción: | Purpose: To compare corneal higher-order aberrations (HOAs) between normal and keratoconic eyes, and to investigate the association between elevation-based corneal topographic indices and corneal wavefront data in the latter group. Methods: In this cross-sectional comparative study, 77 normal right eyes of 77 control subjects and 66 eyes of 36 keratoconic patients were included. In each eye, elevation-based corneal topographic indices including mean keratometry readings, best-fit sphere, maximum elevation, and 3-mm and 5-mm zone irregularity indices were measured using Orbscan II. The Galilei Scheimpflug analyzer was used to measure HOAs of the corneal surface. The independent student t-test was used to compare HOAs between the study groups. Spearman correlation was used to investigate possible associations between Orbscan and Galilei data in the keratoconus group. Results: All Zernike coefficients up to the 4th order except for horizontal trefoil, and vertical and horizontal tetrafoil were significantly greater in the keratoconus group than normal eyes (P |
| Idioma: | Inglés |
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