Validity of Quick Contrast Sensitivity Function Testing in Normally-Sighted Adults

Title Validity of Quick Contrast Sensitivity Function Testing in Normally-Sighted Adults
Author, Co-Author Mariana Ferraz, Ava Bittner
Topic Functional Vision/Pediatrics
Program Number
Ballroom A-B
Illinois College of Optometry

Purpose: To determine the reliability and range of results for area under the log contrast sensitivity function (AULCSF) measures obtained with the quick contrast sensitivity function (qCSF) test in adults without eye disease.

Methods: Eighty-three adults with normal visual acuity (VA better than 20/25), spherical equivalent refractive error

Results: Compared to younger subjects aged 20-49 years (mean AULCSF 1.74, 1.46 or 0.97 for qCSF testing binocularly, monocularly or with the filter monocularly, respectively), participants between the ages of 50-89 had highly statistically significantly reduced AULCSF measures (mean 1.44, 1.23 or 0.71; all p ≤ 0.001). When evaluating the difference in monocular AULCSF with versus without the filter, normals aged 70-89 years had a significantly greater reduction by 23% than subjects aged 20-49 years (95% CI: 11-34%; p < 0.001), likely mediated by natural rod sensitivity loss with aging. Across all normals, mean coefficients of variation (CoV) for AULCSF were 3%, 5% and 10%, while 95% coefficients of repeatability were 0.20, 0.25 and 0.29 log units when testing binocularly, monocularly and filter better eye, respectively. Test-retest variability of binocular AULCSF was not significantly related to age, gender, race, spherical equivalent refractive error or graduate education level (all p > 0.05).

Conclusions: An age-related decline in qCSF occurs initially in the 5th decade of life, with further declines as age increases, which is in agreement with previous CSF publications from the 1980’s and helps to validate the new qCSF test as a reliable, more efficient method to precisely measure the CSF. These data may be used in the future to whether patients with ocular or systemic disease are outside of normal.

Affiliation of Co-Authors Nova Southeastern University