Evaluation of Fusion and Stereopsis in Anisometropic Patients

Abstract

Binocular vision is a type of vision in which humans are able to perceive a single 3D image of their surroundings.(4) Amblyopia is a cause of losing BSV and degradation in its functions as fusion and stereopsis. Anisometropia is the second most common cause of amblyopia. (5) It occurs when unequal focus between the two eyes causes chronic blur on one retina and can occur with relatively small amounts of anisohyperopia or aniso-astigmatism and larger amounts of anisomyopia. (70) Many studies recommended the importance of treating anisometropia as soon as it is diagnosed before the issue of amblyopia occurs and BSV functions affected as fusion and stereopsis. (77) The aim of our study were to evaluate fusion and stereopsis in anisometropic patients with or without amblyopia. Sixty-four patients were enrolled in our prospective analysed study with age range 6:65 years and of both genders who visited general ophthalmology clinic in Ain shams hospitals for vision check-ups between August 2018 and March 2019 and were diagnosed as being anisometropic.