RT Journal Article
T1 Optical power distribution of refractive and aspheric multifocal contact lenses: Effect of pupil size
A1 Madrid Costa, David
A1 Ruiz Alcocer, Javier
A1 García Lázaro, Santiago
A1 Ferrer Blasco, Teresa
A1 Montés Micó, Robert
AB PurposeTo evaluate the power profile within the optic zone of different designs of multifocal contact lenses (CLs) and to analyze how the effect of pupil size could impact on their optical performance.MethodsThe optical power distribution within the optic zones of multifocal CLs was measured by the Nimo TR1504 (LAMBDA-X, Belgium). The multifocal CLs under study were the Acuvue Bifocal, the Acuvue Oasys for Presbyopia, the PureVision Multifocal and the PureVision 2 for Presbyopia. Each design was considered in all their available addition powers. All lenses had a nominal power of −3.0D. At the same time, three lenses of each model were considered and five consecutive readings of each lens were performed.ResultsThe results show that the PureVision Multifocal and the PureVision 2 for Presbyopia have aspheric power profiles. Both designs showed aspheric center-near designs with a smoother progression of the optical power in the PureVision 2 for Presbyopia. The Acuvue Bifocal and the Acuvue Oasys for Presbyopia are shown to have concentric alternating near and far zones. Apart from the refractive rings, the Acuvue Oasys for Presbyopia showed an increase in negative (or less positive) values toward the periphery of the lens.ConclusionsBesides the refraction, the knowledge of the power profiles of multifocal CLs and the effect of pupil size on the optical distribution of these lenses could be crucial to understand the performance of these designs when they are fitted.
PB Elseiver
SN 1367-0484
YR 2015
FD 2015-10-01
LK https://hdl.handle.net/20.500.14352/23508
UL https://hdl.handle.net/20.500.14352/23508
LA eng
NO Received 21 October 2014Received in revised form 16 March 2015Accepted 23 March 2015OA de pago: Esta revista dispone de una opción de acceso abierto de pago.
DS Docta Complutense
RD 14 dic 2025