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Effect of Chromatic Aberration on Contrast Sensitivity in Pseudophakic Eyes
Kazuno Negishi, MD;
Kazuhiko Ohnuma, PhD;
Norio Hirayama, MS;
Toru Noda, MD;
for the Policy-Based Medical Services Network Study Group for Intraocular
Lens and Refractive Surgery
Arch Ophthalmol. 2001;119:1154-1158.
Objective To evaluate the effect of chromatic aberrations in pseudophakic eyes
with various types of intraocular lenses (IOLs).
Patients and Methods The study included 51 eyes of 33 patients who underwent cataract surgery.
The eyes were divided into 3 groups according to the material from which their
IOL was made: group 1, polymethyl methacrylate; group 2, silicone; and group
3, an acrylate/methacrylate copolymer. Ten normal phakic control eyes (group
4) underwent the same examination. Best-corrected distance visual acuity and
contrast sensitivity were measured under white light and monochromatic light
with wavelengths of 470 nm, 549 nm, and 630 nm, with the best correction under
white light.
Results There were no significant differences in best-corrected visual acuity
and contrast sensitivity under the 549-nm monochromatic light in any group.
However, under both white multichromatic light and 470- and 630-nm monochromatic
light, the mean contrast sensitivity in group 3 tended to be lower, sometimes
significantly, than in the other IOL groups.
Conclusions Our results showed that longitudinal chromatic aberrations of some IOLs
may degrade the quality of the retinal image. Attention must be paid to the
detailed optical performance of IOL materials to achieve good visual function.
From the Department of Ophthalmology, Toden Hospital (Dr Negishi),
Tokyo, Japan; the Japan Graduate School of Science and Technology, Chiba University
(Dr Ohnuma), Chiba, Japan; HOYA Healthcare Corporation (Mr Hirayama); and
the Department of Ophthalmology, National Tokyo Medical Center (Dr Noda),
Tokyo, Japan. The authors have no financial interests and have not received
payments as consultants, reviewers, or evaluators. The authors have no commercial
or proprietary interest in any products or companies used in this study.
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