Prevalence of non‐strabismic anomalies of binocular vision in Tamil Nadu: report 2 of BAND study

双眼视觉 验光服务 会聚(光学) 医学 住宿 人口 土生土长的 人口学 泰米尔语 地理 心理学 环境卫生 人工智能 生态学 语言学 哲学 神经科学 社会学 计算机科学 生物
作者
Jameel Rizwana Hussaindeen,Archayeeta Rakshit,Neeraj Singh,Ronnie George,M. S. Swaminathan,Suman Kapila,Mitchell Scheiman,Krishna Kumar Ramani
出处
期刊:Clinical and Experimental Optometry [Taylor & Francis]
卷期号:100 (6): 642-648 被引量:74
标识
DOI:10.1111/cxo.12496
摘要

BackgroundPopulation‐based studies on the prevalence of non‐strabismic anomalies of binocular vision in ethnic Indians are more than two decades old. Based on indigenous normative data, the BAND (Binocular Vision Anomalies and Normative Data) study aims to report the prevalence of non‐strabismic anomalies of binocular vision among school children in rural and urban Tamil Nadu.MethodsThis population‐based, cross‐sectional study was designed to estimate the prevalence of non‐strabismic anomalies of binocular vision in the rural and urban population of Tamil Nadu. In four schools, two each in rural and urban arms, 920 children in the age range of seven to 17 years were included in the study. Comprehensive binocular vision assessment was done for all children including evaluation of vergence and accommodative systems. In the first phase of the study, normative data of parameters of binocular vision were assessed followed by prevalence estimates of non‐strabismic anomalies of binocular vision.ResultsThe mean and standard deviation of the age of the sample were 12.7 ± 2.7 years. The prevalence of non‐strabismic anomalies of binocular vision in the urban and rural arms was found to be 31.5 and 29.6 per cent, respectively. Convergence insufficiency was the most prevalent (16.5 and 17.6 per cent in the urban and rural arms, respectively) among all the types of non‐strabismic anomalies of binocular vision. There was no gender predilection and no statistically significant differences were observed between the rural and urban arms in the prevalence of non‐strabismic anomalies of binocular vision (Z‐test, p > 0.05). The prevalence of non‐strabismic anomalies of binocular vision was found to be higher in the 13 to 17 years age group (36.2 per cent) compared to seven to 12 years (25.1 per cent) (Z‐test, p < 0.05).ConclusionNon‐strabismic binocular vision anomalies are highly prevalent among school children and the prevalence increases with age. With increasing near visual demands in the higher grades, these anomalies could significantly impact the reading efficiency of children. Thus, it is recommended that screening for anomalies of binocular vision should be integrated into the conventional vision screening protocol.
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