Power Profiles of Commercial Multifocal Soft Contact Lenses
نویسندگان
چکیده
منابع مشابه
Power Profiles of Commercial Multifocal Soft Contact Lenses
PURPOSE To evaluate the optical power profiles of commercially available soft multifocal contact lenses and compare their optical designs. METHODS The power profiles of 38 types of multifocal contact lenses-three lenses each-were measured in powers +6D, +3D, +1D, -1D, -3D, and -6D using NIMO TR1504 (Lambda-X, Belgium). All lenses were measured in phosphate buffered saline across 8 mm optic zo...
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PURPOSE Many contact lens (CL) manufacturers produce simultaneous-image lenses in which power varies either smoothly or discontinuously with zonal radius. We present in vitro measurements of some recent CLs and discuss how power profiles might be approximated in terms of nominal distance corrections, near additions, and on-eye visual performance. METHODS Fully hydrated soft, simultaneous-imag...
متن کامل[Measuring the refractive power of customized soft contact lenses].
PURPOSE Soft contact lenses with spherical base curves have been used for many years. The computation of the refractive powers of these lenses is easy, requiring only that one uses the lens maker equation for thick lenses. Nevertheless, for customized contact lenses, there is yet no reliable method for measuring the higher order optical aberrations. In this study we have developed in the Center...
متن کاملShort-term visual performance of soft multifocal contact lenses for presbyopia.
PURPOSE To compare visual acuity (VA), contrast sensitivity, stereopsis, and subjective visual performance of Acuvue® Oasys® for Presbyopia (AOP), Air Optix® Aqua Multifocal (AOMF), and Air Optix® Aqua Single Vision (AOSV) lenses in patients with presbyopia. METHODS A single-blinded crossover trial was conducted. Twenty patients with mild presbyopia (add ≤+1.25 D) and 22 with moderate/severe ...
متن کاملSoft contact lenses in cases of aphakia.
The use of hydrophilic acrylates (POIYHEMA) in the composition of contact lenses was first described by Wichterle and Lim (I960). The development of a spun cast lens has taken several years. The basic technique by Wichterle has now been extended by the manufacturers, Bausch and Lomb. Whilst the low minus powers are available in more than one back curve fitting, the high minus and aphakic series...
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ژورنال
عنوان ژورنال: Optometry and Vision Science
سال: 2017
ISSN: 1538-9235,1040-5488
DOI: 10.1097/opx.0000000000000998