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Corneal Aberrations in Normal and Keratoconic Eyes Using an Opd-Scan ⅱ; [Opd-Scan ⅱ检测正常眼和圆锥角膜眼的角膜像差] Publisher



Naderan M1 ; Jahanrad A2 ; Farjadnia M3
Authors
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Authors Affiliations
  1. 1. School of Medicine, Tehran University of Medical Sciences, Tehran, 1417653761, Iran
  2. 2. AJA University of Medical Sciences, Tehran, 1411718541, Iran
  3. 3. School of Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran

Source: International Eye Science Published:2018


Abstract

AIM: To evaluate higher order aberrations (HOAs) of the corneal surface in normal and keratoconic eyes. METHODS: Using an OPD-Scan Ⅱ wavefront analyzer, aberrometric parameters of the corneal surface in one eye of 80 patients with keratoconus (KC) and 91 participants with normal eyes were evaluated. The Zernike coefficients from third- to sixth-order as well as root mean square (RMS) of primary coma, coma-like aberrations, and total HOA were calculated and compared between both groups. RESULTS: Statistically significant differences were found in all aberrometric parameters between the measurements of the KC and normal participants (P<0.001). All of the aberrometric parameters were significantly higher in the KC patients compared to the normal group (P<0.001). CONCLUSION: Corneal wavefront measurements by means of OPD-Scan Ⅱ were significantly higher in keratoconic corneas than normal corneas. Copyright 2018 by the IJO Press.
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