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Visual performance with multifocal systems under dim conditions

Poster Details

First Author: S.García-Lázaro SPAIN

Co Author(s):    T. Ferrer-Blasco   A. Domínguez-Vicent   A. Del Águila-Carrasco   R. Montés-Micó     

Abstract Details



Purpose:

To assess and compare the effects of four simultaneous vision multifocal contact lenses on visual performance in early presbyopes, under dim conditions, including the effects of induced glare

Setting:

Universitat de Valencia, Spain

Methods:

In this double-masked crossover study design, 10 presbyopic patients (age range 40 to 43 years) were included. All patients were fitted with monofocal contact lenses (Air Optix Aqua, Alcon) and with four different multifocal simultaneous contact lenses [Air Optix Aqua Multifocal (AOAM) (Alcon), PureVision Multifocal (PM) (Bausch & Lomb), Acuvue Oasys for Presbyopia (AOP) (Johnson & Johnson Vision), Biofinity Multifocal (BM) (CooperVision)]. After 1 month, binocular distance visual acuity (BDVA) and binocular distance contrast sensitivity (BDCS) were measured with the Optec 6500 vision testing system (Stereo Optical Co, Inc.) under mesopic conditions (3 cd/m2), the latter also under two levels of induced glare: 1.0 lux (glare level 1) and 28 lux (glare level 2), in each patient after contact lens fitting

Results:

In terms of BDVA, monofocal contact lens performed better at all lighting conditions, followed by the AOAM and PM (without differences between them), with the BM and AOP obtaining the worst results. All lenses performed better at mesopic level without glare, followed by the mesopic level with glare level 1, and with worst results obtained under glare level 2 and mesopic conditions. Binocular distance contrast sensitivity revealed statistically significant differences between the monofocal and any modalities of simultaneous contact lenses for 12 cycles per degree (cpd), at the 3-luminance conditions evaluated

Conclusions:

Monofocal contact lenses provide greater visual performance than simultaneous vision multifocal contact lenses for distance under mesopic conditions and including the effects of induced glare in early presbyopes

Financial Disclosure:

NONE

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