Contrast Sensitivity Comparison of Alternate Exotropia in Different Amount of Deviation

Authors: Partha Haradhan Chowdhury* and Brinda Haren Shah

DOI: 10.23880/oajo-16000s1-010

Special Issue 1

Abstract

Purpose: Aim of the present study is to compare contrast sensitivity in different amounts of deviation of alternate esotropia. Methods: A pilot, cross sectional, observational study was performed at tertiary eye care centers. Subjects with Ocular deviation between 10 to 40 prism diopters, Corrected distance Visual Acuity should be greater than 6/18 and Age should be between 10 to 40 years of age were included in the study. Contrast sensitivity was assessed with Pelli Robson Chart. Results: 30 subjects were included in the study. Out of that, 16 subjects were in the age group of 11-20 years, 12 subjects were in the age group of 21-30 years and 2 subjects were in the age group of 31-40 years. 60% subjects were Female and 40% subjects were Male. The mean contrast sensitivity was considered in each amount of deviation. It shows that maximum contrast is deteriorated in the ocular deviation of 31-40 prism diopters. Conclusions: As the amount of ocular deviation increases, contrast sensitivity will be more deteriorated.

Keywords: Contrast Sensitivity; Amount of deviation; Alternate Exotropia

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