PREVALENCE OF NON STRABISMIC VERGENCE DYSFUNCTIONS IN AN ORTHOPTIC CLNIC

900 WordsApr 23, 20194 Pages
PREVALENCE OF NON STRABISMIC VERGENCE DYSFUNCTIONS IN AN ORTHOPTIC CLNIC INTRODUCTION In the preceding generations, fine distance visual acuity and stereoscopic vision were of paramount importance, since the survival depended absolutely on the capability to farm, hunt and fish. But today, the emphasis has shifted virtually from distance visual functions to two dimensional near visual tasks such as desk work, reading, computer usage etc.The presence of non strabismic binocular dysfunctions such as accommodative and vergence anomalies make it difficult for the visual system to perform these kind of activities with accuracy and effortlessness. When persons, who are in short of suitable accommodative and vergence amplitudes, are involved…show more content…
In a clinical study to determine the presence and clinical implications of the general binocular dysfunctions in a population of university students, Esteban Porcar et al 4 found a prevalence of 32.3 % of non strabismic binocular anomalies. To achieve as estimate of the population prevalence of vergence dysfunctions, we have systematically reviewed the previous studies related to this. So this study was designed to estimate the prevalence of vergence dysfunctions in an orthoptic clinic set up and also to set up well defined diagnostic criteria for all the vergence anomalies. MATERIALS AND METHODS 755 Patients above the age of seven years presented consecutively to the orthoptics clinic of Sankara Nethralaya, Chennai between March 2010 and February 2011 was considered for this retrospective cohort study based on the inclusion and the exclusion criteria with the help of Medical Record Department and Electronic Medical Record (EMR) search engine. The inclusion criteria used were age more than or equal to seven years, distance best corrected visual acuity of > 6/9 in both the eyes, near best corrected visual acuity of N6 @ 30-40 cm, adequate sensory fusion with worth four dot test for distance as well as for near, Random Dot stereo acuity of 500 arc seconds or more. All the patients who had a history of monocular or binocular amblyopia, manifest

    More about PREVALENCE OF NON STRABISMIC VERGENCE DYSFUNCTIONS IN AN ORTHOPTIC CLNIC

      Open Document