Design characteristics and point-spread function evaluation of bifocal intraocular lenses

Pascal O. Rol

doi:10.1117/12.43958

1 June 1991 Design characteristics and point-spread function evaluation of bifocal intraocular lenses

Pascal O. Rol

Proceedings Volume 1423, Ophthalmic Technologies; (1991) https://doi.org/10.1117/12.43958
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

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.

Citation Download Citation

Pascal O. Rol "Design characteristics and point-spread function evaluation of bifocal intraocular lenses", Proc. SPIE 1423, Ophthalmic Technologies, (1 June 1991); https://doi.org/10.1117/12.43958

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