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Journal of Ophthalmology
Volume 2016 (2016), Article ID 4247973, 8 pages
Research Article

Assessment of Optical Quality at Different Contrast Levels in Pseudophakic Eyes

1Department of Ophthalmology and Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
2Department of Visual Optics, Division of Health Science and Graduate School of Health and Welfare, Baekseok University, Cheonan 31065, Republic of Korea

Received 26 August 2015; Revised 8 January 2016; Accepted 11 January 2016

Academic Editor: Tamer A. Macky

Copyright © 2016 Chang Won Park et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Purpose. To assess visual function using Optical Quality Analysis System (OQAS) at varying levels of contrast in pseudophakic eyes. Methods. The study included patients admitted to Seoul St. Mary’s Hospital between January and February 2012: 143 pseudophakic eyes with one of five intraocular lens types, examined 2–6 months after cataract surgery, and 93 normal eyes (enhanced visual acuity (VA) < 0.1 logMAR) in age-matched controls. Subjects were examined at three contrast levels using the OQAS. Results. At 100%, 20%, and 9% contrast, simulated mean VA was  logMAR,  logMAR, and  logMAR, in normal eyes, and  logMAR,  logMAR, and  logMAR, respectively, in pseudophakic eyes. Simulated VA decreased significantly when contrast was reduced, regardless of ocular status, age group, and lens type (). There were no significant differences between normal and pseudophakic eyes among subjects aged 50–69 (). Among subjects aged 70–79, pseudophakic eyes showed improved simulated VA () and objective scattering index values (). Conclusions. Patients with intraocular lenses have similar or superior visual function when compared to those with normal eyes at 2–6 months after cataract surgery, even under low-contrast conditions.