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Proceedings Paper

Design characteristics and point-spread function evaluation of bifocal intraocular lenses
Author(s): Pascal O. Rol
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Paper Abstract

Lens extraction during cataract operation has mainly two consequences: first, a reduction of the refractive power of the eye and second, the loss of accommodation. Insertion of a monofocal intraocular lens counterbalances the first effect, accommodation, however, remains lost. Various types of intraocular lenses exhibiting two different focal lengths (bifocal) are at present under clinical trial. With such lenses one focal length corresponds to the far vision (P.) while the other is related to the near vision (P )(Fig. 1). In both cases, however, two images are formed simultaneously in the eye: one is focused on the retina while the other is out of focus. First clinical results indicate that a satisfactory situation can be obtained both in far and near vision.

Paper Details

Date Published: 1 June 1991
PDF: 5 pages
Proc. SPIE 1423, Ophthalmic Technologies, (1 June 1991); doi: 10.1117/12.43958
Show Author Affiliations
Pascal O. Rol, Swiss Federal Institute of Technology and Univ. of Zuerich (Switzerland)

Published in SPIE Proceedings Vol. 1423:
Ophthalmic Technologies
Carmen A. Puliafito, Editor(s)

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