Comparison of a diffractive bifocal and a monofocal intraocular lens
Purpose: To compare a Pharmacia diffractive bifocal intraocular lens (IOL) with a monofocal lens of the same design without the diffractive grating. Setting:. Multicenter study. Methods: This randomized, prospective study comprised 70 patients with a monofocal IOL and 79 with a diffractive bifocal I...
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Published in | Journal of cataract and refractive surgery Vol. 22; no. 4; pp. 446 - 451 |
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Main Authors | , , , , , , , , |
Format | Journal Article Conference Proceeding |
Language | English |
Published |
New York, NY
Elsevier Inc
01.05.1996
Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | Purpose: To compare a Pharmacia diffractive bifocal intraocular lens (IOL) with a monofocal lens of the same design without the diffractive grating.
Setting:. Multicenter study.
Methods: This randomized, prospective study comprised 70 patients with a monofocal IOL and 79 with a diffractive bifocal IOL. Follow-up was 5 to 6 months. Near and distance visual acuities, contrast sensitivity, patient satisfaction, and spectacle use were evaluated.
Results: All patients achieved a best corrected visual acuity of 0.5 or better; 80% in the monofocal and 71 % in the bifocal group had a best corrected visual acuity of 1.0 or better. Without correction, 93% of the bifocal and 9% of the monofocal group could read J3 or better. With distance correction, 99% and 4%, respectively, could read J3 or better. Contrast sensitivity was slightly lower in the bifocal group at distance and near for all spatial frequencies. In the bifocal group, 46% never used spectacles for near tasks. Overall satisfaction was rated good by 86% of the monofocal and 85% of the bifocal group.
Conclusions: The diffractive bifocal IOL performed well at distance and near. Patients who no longer require spectacles will benefit significantly from a bifocal IOL, but many with a bifocal IOL in one eye will require spectacles for the fellow eye. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 ObjectType-News-3 content type line 23 |
ISSN: | 0886-3350 1873-4502 |
DOI: | 10.1016/S0886-3350(96)80040-X |