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Two simple methods of assessing visual outcome following cataract surgery were evaluated in India. The first used data obtained from standardized patient records of cataract surgery. The second used data from population-based rapid epidemiological assessments. Analysis of 4168 hospital and eye camp records showed that, with the available standard(More)
OBJECTIVES To estimate the prevalence of avoidable blindness in > or =50-year-olds in Nakuru district, Kenya, and to evaluate the Rapid Assessment for Avoidable Blindness (RAAB), a new methodology to measure the magnitude and causes of blindness. DESIGN Cross-sectional population-based survey. PARTICIPANTS Seventy-six clusters of 50 people 50 years or(More)
BACKGROUND The World Health Organization estimates that there were 37 million blind people in 2002 and that the prevalence of blindness was 9% among adults in Africa aged 50 years or older. Recent surveys indicate that this figure may be overestimated, while a survey from southern Sudan suggested that postconflict areas are particularly vulnerable to(More)
Uncorrected refractive errors are the main cause of severely impaired vision in India. This in itself indicates that there is a shortage of basic eye care services and spectacles, and too little public awareness of the need for them. A simple method for screening schoolchildren for refractive errors is described and the results are analysed. Evaluation of(More)
AIMS To estimate the magnitude and causes of blindness in people aged > or =50 years in Satkhira district, Bangladesh, and to assess the availability of cataract surgical services. METHODS 106 clusters of 50 people aged > or =50 years were selected by probability-proportionate to size sampling. Households were selected by compact segment sampling.(More)
PURPOSE To estimate prevalence and number of people visually impaired or blind due to cataract. METHODS Based on the Global Burden of Diseases Study 2010 and ongoing literature research, we examined how many people were affected by moderate to severe vision impairment (MSVI; presenting visual acuity <6/18, ≥3/60) and blindness (presenting visual acuity(More)
OBJECTIVE To estimate the prevalence of blindness in children in Vietnam and to assess the major causes. DESIGN A population-based study sampled children from 16 provinces across Vietnam. The second study examined children attending all blind schools in Vietnam. PARTICIPANTS In 16 provinces, 28 800 children aged 0-15 were sampled. In 28 blind schools,(More)
AIM To determine whether monitoring of cataract outcome can be implemented as a routine activity in different hospital settings in Africa and Asia, and to assess the impact of routine monitoring. METHODS Eight eye centres in Asia and Africa were involved in the study between 1 June and 31 December 2000. Seven centres used a specifically designed cataract(More)
OBJECTIVE To test the applicability of lot quality assurance sampling (LQAS) for the rapid assessment of the prevalence of active trachoma. METHODS Prevalence of active trachoma in six communities was found by examining all children aged 2-5 years. Trial surveys were conducted in these communities. A sampling plan appropriate for classifying communities(More)