Visual performance comparison between contact-lens based pinhole and simultaneous vision contact lenses

Poster Details

First Author: S.Garc SPAIN

Co Author(s):    D. Madrid Costa   A. Dom   H. Radhakrishnan   R. Mont     

Abstract Details

Purpose:

To evaluate the visual performance provided with a contact-lens based pinhole design and a simultaneous vision multifocal contact lens.

Setting:

University of Valencia, Spain

Methods:

In a cross over study design, 22 presbyopic patients were evaluated using an artificial pupil design fitted on the non-dominant eye and the simultaneous vision PureVision Multifocal contact lenses. After 1 month of contact lens wear, binocular distance visual acuity (BDVA), binocular near visual acuity (BNVA), defocus curve, binocular distance contrast sensitivity, binocular near contrast sensitivity, and stereoacuity were measured, under photopic conditions (85 cd/m2). Moreover, BDVA and binocular distance contrast sensitivity were examined under mesopic conditions (5 cd/m2).

Results:

Mean BDVA for pinhole and Purevision multifocal were 0.02±0.04 and 0.01±0.04 logMAR under photopic conditions, and 0.16±0.06 and 0.12±0.04 logMAR for BNVA under mesopic conditions, respectively. No statistically significant differences were found between both types of lenses at distance for both lighting levels and intermediate distances (p>0.05). However, there was significant differences at near vision under photopic conditions (p=0.03). Binocular distance contrast sensitivity revealed statistically significant differences between pinhole system and PureVision Multifocal for 6 and 12 cpd spatial frequencies at the 2 luminance levels; while for near vision differences were also significant for 18 cpd. Stereoacuity was better with PureVision Multifocal (127± 49.3 sec arc) compared with the pinhole lens (220.2±32.3 sec arc, p=0.004).

Conclusions:

Pinhole and PureVision Multifocal contact lenses provide good binocular vision for distance and functional intermediate vision. However, although it was better with the PureVision Multifocal, near vision was not satisfactory for either of the two contact lens options. FINANCIAL DISCLOSURE?: No