Hans Limburg

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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)
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)
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)
AIM The aim of this study was to estimate the prevalence and causes of blindness, severe visual impairment (SVI), moderate visual impairment (MVI), and early visual impairment (EVI) and its causes in an established market economy of Europe. DESIGN A cross-sectional population-based survey. METHODS A sample size of 3675 was calculated using the standard(More)
A census survey in Mohadi block, Bhandara district of Maharashtra, indicated that the prevalence of blindness and cataract blindness has increased, compared with the 1986 survey. Around one third of the persons blind from cataract have been covered by surgical services. To increase coverage, more emphasis on information, education and communication is(More)
PURPOSE Causes of low vision in the Netherlands may have changed over time. The purpose of this study is to assess trends over the last two decades. METHODS Socio-demographic and medical data, including ophthalmic diagnosis and inheritance patterns for 2843 children with low vision (0-21 years; 50% representation) referred to a Dutch institute for low(More)
AIM To present results of a rapid assessment of cataract in Turkmenistan. METHODS 6120 eligible people of 50 years and older were selected by systematic random sampling from the whole of Turkmenistan. A total of 6011 people were examined (coverage 98.2%). RESULTS Cataract is the major cause of bilateral blindness (54%), followed by glaucoma (25%). The(More)
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)