Evaluation of anterior and posterior corneal aberrations in patients with keratoconus

Abstract

Evaluation of anterior and posterior corneal aberrations in patients with keratoconusPoster DetailsFirst Author: E.AltinkurtTURKEYCo Author(s): O. Muftuoglu S. Karaman Erdur Abstract DetailsPurpose:To evaluate the anterior and posterior corneal aberrations in patients with keratoconus.Setting:The study is made in a tertiary referral center.Methods:100 eyes of 57 patients with clinical keratoconus and 100 eyes of 50 control patients who were refractive surgery candidates were included in this study. All eyes were evaluated before and 6-months after surgery using Placido-Scheimpflug combined topo/tomographer. Visual acuity, keratometry, anterior, posterior, and total corneal aberrations were analyzed.Results:The mean Ksteep was 48.6 ± 4.8 D in keratoconus group, and 43.2 ±2.1 D in control group. The mean anterior corneal total higher order aberration, coma, and spherical aberration were 1.83±1.39 µm, 1.44 ± 0.92 µm, 0.31 ± 0.29 µm, respectively. The mean posterior corneal total higher order aberration, coma, and spherical aberration were 1.04 ± 1.63 µm, 0.36 ± 0.32 µm, 0.16 ± 0.21 µm, respectively. The mean anterior and posterior corneal total higher order aberration, coma, and spherical aberration were significantly higher than those of control groups (p˂0.05). The differences were more prominent in posterior corneal aberrations.Conclusions:Corneal higher order aberrations, particularly posterior corneal aberrations are significantly higher in eyes with keratoconus compared to normal controls.