Prevalence of Non-Strabismic Binocular Vision Dysfunction in A Hospital based Population
Keywords:Headache, Incidence, Non strabismic binocular vision disorders, Orthoptic evaluation, Focusing problem, accommodative insufficiency, fusional vergence dysfunction.
This study was aimed towards finding the prevalence of non strabismic binocular vision dysfunctions
(NSBVD) in the Indian population presenting with different symptoms pertaining to binocular vision
disorders. Method: This retrospective study included one hundred and sixty one patients who presented
to the out- patient department with symptoms of binocular vision dysfunction, during a period of one
year. Patients were in the age group of 18 ±6.93, with 71 males and 90 females. Their binocular vision
dysfunction was assessed via several diagnostic modules/tools designed for binocular vision assessment.
Results: Results indicate that the most common binocular vision anomalies in this studied population are
fusional vergence dysfunction with accommodative infacility (40.38%), convergence insufficiency with
accommodative infacility (24.36%), Fusional vergence dysfunction (7.05%). Convergence Insufficiency
and Accommodative infacility showed the same prevalence of 7.7%. Discussion: Accommodative and non
strabismic binocular vision dysfunctions are commonly underdiagnosed/undiagnosed in clinical practice.
These disorders affect academic performance, sports activities and general quality of life. An appropriate
detailed orthoptic examination and accurate diagnosis is necessary to manage these binocular vision
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