Posters

Visual performance through pinhole contact lens for presbyopia correction

Poster Details

First Author: S.García-Lázaro SPAIN

Co Author(s):    T. Ferrer-Blasco   C. Albarrán-Diego   D. Madrid-Costa   R. Montés-Micó     

Abstract Details

Purpose:

To evaluate the effects of different contact-lens based artificial pupil designs on visual performance.

Setting:

University of Valencia

Methods:

22 presbyopic patients (age range 50 to 64 years) were evaluated using 4 different artificial pupil designs on the non-dominant eye. Binocular uncorrected distance visual acuity (UDVA), binocular corrected distance visual acuity (CDVA), binocular uncorrected near visual acuity (UNVA), binocular distance-corrected near visual acuity (DCNVA), defocus curve, binocular distance and near contrast sensitivity under photopic and mesopic conditions, and stereoacuity were measured in each patient after contact lens fitting

Results:

For distance, UDVA and CDVA ranged from 0.04 ± 0.05 to -0.01 ± 0.04, and from - 0.02 ± 0.05 to -0.05 ± 0.03 logMAR, respectively; for near, UNVA and DCNVA ranged from 0.37 ± 0.11 to 0.42 ± 0.20, and from 0.35 ± 0.17 to 0.38 ± 0.12 logMAR, respectively. Binocular distance contrast sensitivity revealed statistically significant differences between the different pinhole systems and the control group (corrected distance patients without pinhole lens) for 6 cycles per degree (cpd), 12 cpd and 18 cpd; while for near vision differences were also significant for 3 cpd at the 2 luminance levels (p<0.05). Stereoacuity values not were significantly different between the four pinhole systems for near vision (p>0.05).

Conclusions:

Soft contact lenses aperture provides good visual acuity at distance, functional intermediate vision and poor near visual acuity and stereoacuity. An improvement on visual performance with decreasing pupil diameter could not be found. FINANCIAL INTEREST: NONE