Prevalence of blindness and visual impairment and its causes among people aged 50 years and above in Karnali Zone, Nepal
| Autor: | S Dulal, Y D Sapkota |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Male
Refractive error Pediatrics medicine.medical_specialty Visual acuity genetic structures Visual impairment Visual Acuity Vision Low Audiology Blindness Cataract Age Distribution Nepal Prevalence Mydriasis medicine Humans Vision test Sex Distribution Poverty Blindness prevention Aged Aged 80 and over Pinhole visual acuity business.industry Vision Tests Age Factors General Medicine Middle Aged Refractive Errors medicine.disease eye diseases Female medicine.symptom business |
| Zdroj: | Nepalese Journal of Ophthalmology. 4:282-287 |
| ISSN: | 2091-0320 2072-6805 |
| Popis: | Objective: To estimate the prevalence of blindness and visual impairment and its causes among those aged 50 years and above in Karnali Zone. Materials and methods: Stratified cluster sampling method was used. Twenty four clusters of 50 people aged 50 years and above were selected for the study. Visual acuity was recorded with simplified vision testing card with one optotype “E” of size 60 on one side and size 18 on the other side. Examination by ophthalmologist under mydriasis was done for those with a pinhole visual acuity of less than 6/18. Results: Of 1200 enumerated persons 1,174 were examined (97.8% response rate). The prevalence of blindness (VA |
| Databáze: | OpenAIRE |
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