PREVALENCE OF NON STRABISMIC VERGENCE DYSFUNCTIONS IN AN ORTHOPTIC CLNIC

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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 in near visual activities, they may develop ocular symptoms that may further impinge on their visual performance. Indian literature has no significant number of studies that have been conducted to determine the prevalence of vergence dysfunctions and there is a lack of consensus in the scientific literature on what diagnostic criteria should be used to define each anomaly. Prevalence of a disorder refers to the total number of cases of a disorder or a disease that exists in the population, either during a period of time or at a specific point in time1.Prevalence data provide valuable information to health care professionals, enabling them to allocate resources efficiently and to plan effective diagnostic approaches, treatment options, preventive measures and in conducting public awareness programmes. Proper epidemiological information based on scientific evidence can help in many areas such as decision-making in certain clinical initiatives. In a clinical trial to determine the prevalence of bi... ... middle of paper ... ...s. The table 1 shows the classification criteria used in this study for categorizing vergence dysfunctions. Works Cited 1) Fletcher RH, Fletcher SW. Clinical epidemiology: the essentials.Philadelphia: Lippincott Williams & Wilkins; 2007. 2) Maino D. The binocular vision dysfunction pandemic. Optom Vis Dev 2010; 41(1):6-13. 3) Hokoda SC.General binocular dysfunctions in an urban optometry clinic.Am Optom Assoc 1985;56;560-562 4) Esteban Porcar, Antonio Martinez-Palomera, Prevalence of general binocular dysfunctions in a population of university students. Optometry and vision science February 1997;Vol 74;No 2 5) Michael W.Rouse et al. Frequency of convergence insufficiency among fifth and sixth graders. Optometry and vision science.Vol 76;No 9;643-649 6) Morgan M.W.The clinical aspects of accommodation and convergence. Am J Optom Arch Am Acad Optom;1944;21;301-313

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