Visual performance in cataract patients with low levels of postoperative astigmatism: full correction versus spherical equivalent correction
Identifieur interne : 001C35 ( Pmc/Corpus ); précédent : 001C34; suivant : 001C36Visual performance in cataract patients with low levels of postoperative astigmatism: full correction versus spherical equivalent correction
Auteurs : Robert P. Lehmann ; Diane M. HoutmanSource :
- Clinical Ophthalmology (Auckland, N.Z.) [ 1177-5467 ] ; 2012.
Abstract
To evaluate whether visual performance could be improved in pseudophakic subjects by correcting low levels of postoperative astigmatism.
An exploratory, noninterventional study was conducted using subjects who had been implanted with an aspheric intraocular lens and had 0.5–0.75 diopter postoperative astigmatism. Monocular visual performance using full correction was compared with visual performance using spherical equivalent correction. Testing consisted of high- and low-contrast visual acuity, contrast sensitivity, and reading acuity and speed using the Radner Reading Charts.
Thirty-eight of 40 subjects completed testing. Visual acuities at three contrast levels (100%, 25%, and 9%) were significantly better using full correction than when using spherical equivalent correction (all
In this study of pseudophakic subjects with low levels of postoperative astigmatism, full correction yielded significantly better reading performance and high- and low-contrast visual acuity than spherical equivalent correction, suggesting that cataractous patients may benefit from surgical correction of low levels of preoperative corneal astigmatism.
Url:
DOI: 10.2147/OPTH.S28241
PubMed: 22399846
PubMed Central: 3295631
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