Higher-order aberrations induced by nuclear cataract
Accepted 20 August 2008.
Refers to erratum:
Erratum
Journal of Cataract & Refractive Surgery
January 2009 (Vol. 35, Issue 1, Page 4) Full Text |
Full-Text PDF (57 KB)
Purpose
To measure higher-order aberrations (HOAs) in the entire eye and in the internal optics (lens) in patients with nuclear cataract.
Setting
Department of Ophthalmology, University of Ulsan College of Medicine, Seoul, Korea.
Methods
A visual function analyzer that combines ray-tracing aberrometry and corneal topography was used to measure wavefront aberrations in 33 eyes of 20 patients who had nuclear cataract.
Results
The wavefront maps of the entire eye were similar to those of the internal optics. The average root mean square (RMS) of HOAs in the entire eye and in the internal optics was 1.59 μm and 2.13 μm, respectively, with an optical zone of 6.5 mm. The predominant HOA in the entire eye and the internal optics was coma; the mean RMS of coma was 0.98 μm in the entire eye and 1.28 μm in the internal optics. The spherical aberration of the internal optics correlated negatively with the grade of nuclear cataract (r = −0.450, P = .009).
Conclusions
Most HOAs in eyes with nuclear cataracts were due to the internal optics; coma was the predominant HOA. The grade of nuclear cataract was negatively correlated with the amount of spherical aberration. These findings may explain the subjective symptoms in patients with nuclear cataract.
From the Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
Corresponding author: Myoung Joon Kim, MD, Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 388-1 Pungnap-2dong, Songpa-gu, Seoul 138-736, Korea.
This study was supported by a grant 07-400 from the Asian Institutes for Life Sciences, Seoul, Korea.
No author has a financial or proprietary interest in any material or method mentioned.
Presented in part at the ASCRS Symposium on Cataract, IOL and Refractive Surgery, San Diego, California, USA, April 2007.
ABSTRACT