منابع مشابه
Quality of vision through diffractive bifocal intraocular lenses.
Two elderly women have each received a monofocal intraocular lens in one eye and a 3M diffractive bifocal intraocular lens in the other eye. Both eyes were shown to have equivalent retinal/neural function by measuring contrast sensitivity to laser interference fringes which bypassed refractive and other defects of the ocular media. The eyes with a bifocal intraocular lens displayed a much great...
متن کاملPsychophysical Vision Simulation of Diffractive Bifocal and Trifocal Intraocular Lenses
PURPOSE The visual performance of monofocal, bifocal, and trifocal intraocular lenses was evaluated by human individuals using a vision simulator device. This allowed investigation of the visual impression after cataract surgery, without the need actually to implant the lenses. METHODS The randomized, double-masked, three-way cross-over study was conducted on 60 healthy male and female subjec...
متن کاملOptical quality differences between three multifocal intraocular lenses: bifocal low add, bifocal moderate add, and trifocal.
PURPOSE To compare the in vitro optical quality at different focal points of two new bifocal intraocular lenses (IOLs) and one new trifocal IOL. METHODS The AcrySof ReSTOR SV25T0 (+2.5 diopter [D] add) and the AcrySof ReSTOR SN6AD1 (+3.0 D add) with two main foci (Alcon Laboratories, Fort Worth, TX) and the AT LISA tri 839MP with three main foci (Carl Zeiss Meditec, Dublin, CA) were evaluated...
متن کاملBifocal trial lenses.
IT is sometimes convenient to demonstrate to a patient, who has not worn them before, the usefulness of bifocal glasses. There is in existence a foreign trial frame in which the ordinary trial lens can be clipped in from below so that the upper part occupies the same position as the reading segment of a bifocal. This appears to be a clumsy arrangement since the lower portion of the lens may not...
متن کاملComparison of clinical performance between trifocal and bifocal intraocular lenses: A meta-analysis
PURPOSE To compare the clinical performance between trifocal and bifocal intraocular lenses in bilateral cataract and/or refractive lens exchange (RLE) surgery. METHODS A comprehensive literature search of PubMed, EMBASE, Cochrane Controlled Trials Register and Web of Science was performed through October 2016 to identify randomized, controlled trials (RCTs) and comparative cohort studies. Th...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1991
ISSN: 0007-1161
DOI: 10.1136/bjo.75.6.367