Introduction: Use of LED based devices is increasing substantially in recent years, however, these devices could have an adverse effect on ocular health. Study aimed to evaluate the relationship between direct exposure to LED and ocular symptoms. Material and Methods: The data was collected from secondary school students studying in a girls' college at Bareilly during an eye camp organized by Muskaan Foundation. Only girls having known intact vision (BCVA 6-6/6-9) were enrolled in the study. A total of 536 girls were enrolled in the study. Average daily direct exposure <3-4 hours was categorized as unexposed while those having >3-4 hours daytime or 1-2 hrs or more night time exposure were categorized as exposed. The exposed girls were divided into day exposed and night exposed respectively. Ocular symptoms were noted. Chi-square test and ANOVA were calculated using SPSS 21.0 software. Results: Mean age of girls was 17.02±1.42 (Range 15-19) years. A total of 298 (55.5%) had direct exposure to LED. Prevalence of ocular symptoms like headache, pain in eyes, blurring, floaters, burning sensation and eye fatigue was 34.3%, 34.1%, 26.3%, 24.3%, 41.6% and 39% respectively. Total No. of symptomatic girls was 387 (72.2%) A significant increase in ocular symptoms was observed from unexposed to daytime and to night exposed girls (p<0.001). Mean number of total symptoms also showed a significant increasing trend from unexposed to nighttime exposure (p<0.001). Conclusion: Direct LED light exposure for a substantial period, particularly during night time is detrimental to ocular health.
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