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Thesis

Soft bifocal contact lenses for presbyopia

1 April 1983

Abstract

Hydrogel bifocal contact lenses are discussed including designs, parameters, market introduction, investigational research reviews and survey results regarding fitting techniques, patient adaptation, and the future prognosis of these lenses. Also included is a review of basic contact lens designs, and related systems for presbyopes which existed prior to the introduction of soft bifocals. Investigational research indicates soft bifocal patient success rates ranging from 59% to 89%; investigators are very optimistic about the future usefulness of these lenses. Results from our survey indicate that with only two bifocal soft lenses being F.D.A. approved, and another eight to ten bifocal soft contact lenses awaiting approval, Portland, Oregon optometrists are adopting a wait-and-see attitude toward soft bifocal contact lenses.


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