PMID: 9541434Apr 16, 1998Paper

Visual Ability Score -- a new method to analyze ability in visually impaired children

Acta Ophthalmologica Scandinavica
O KatsumiT Hirose

Abstract

We analyzed the correlation between the Preferential Looking (PL) acuities and the Visual Ability Scores (VAS) of 600 patients (many with severe retinopathy of prematurity) to determine their ability to perform various activities within the daily environment. Visual acuity was measured by PL. Sixteen visual activities within the environment were analyzed. The VAS (range, 1-16) were calculated from the results of each activity and correlated with PL acuity. The PL acuities of the 600 patients ranged from 20/20 (1.0) to <20/3200 (0.006) [mean, 20/337(006)]. The VAS ranged from 1 to 16 points (mean, 10.65; SD, +/-4.80) and showed a high correlation with the PL acuities (r=0.917, p=0.0001). In addition to PL vision testing, analyzing the environmental visual behavior of young, severely visually impaired patients is important to accurately evaluate visual abilities. We found the VAS to be an important aid for low-vision specialists, especially for those with no access to a vision evaluation system such as PL.

Citations

Feb 11, 2014·Early Human Development·Victoria PueyoEva Andres
Mar 24, 2020·Journal of Pediatric Ophthalmology and Strabismus·Gilles C MartinVéronique Abadie

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