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- W4256311057 abstract "Abstract Background: Visual impairment and blindness are significant public health issues worldwide. This study aimed to estimate the prevalence and causes of moderate to severe visual impairment (MSVI) and blindness in people aged 15 years and above across three ecological regions of Nepal. Methods: A comparative cross-sectional study was conducted in one district in each of the three ecological regions of Nepal. Intensive training was provided to health workers on how to conduct door-to-door enumeration, visual acuity testing and referral when indicated for comprehensive ocular examination by technicians and ophthalmologists to diagnose and treat ocular morbidities. Collected data were analyzed using Statistical Package for Social Science (SPSS) v19.0 and Stata v10.0 software. Results: Altogether 5234 participants were enrolled in the study (participation rate 96.4%). The overall prevalence of MSVI was 9.5% (95% CI = 8.7 - 10.3) which was 4.7% in the Mountain district, 11.2% in the Hill district and 21.2% in the Tarai district. In those aged 15-49 years MSVI prevalence was 1.5% and in those aged ≥50 it was 25.1%. The overall prevalence of blindness was 0.9% (95% CI=0.6-1.2), and the prevalence of blindness in the 15-49 and ≥50 age groups was 0.2% and 2.3% respectively. Most cases of visual impairment and blindness (95.5%) were due to cataract and uncorrected refractive error. Overall, cataract was the leading cause of visual impairment and blindness (53.5%), followed by uncorrected refractive error (39.5%). Conclusion: The prevalence of visual impairment and blindness varied significantly with age, ethnicity and locality. The correction of refractive error and cataract surgery would reduce nine in ten cases of moderate to severe visual impairment and blindness. Key words: Epidemiology, Public health, visual, Optic and refraction" @default.
- W4256311057 created "2022-05-12" @default.
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- W4256311057 date "2019-11-22" @default.
- W4256311057 modified "2023-09-28" @default.
- W4256311057 title "Prevalence and causes of visual impairment and blindness in three ecological regions of Nepal" @default.
- W4256311057 doi "https://doi.org/10.21203/rs.2.520/v5" @default.
- W4256311057 hasPublicationYear "2019" @default.
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