Population-based eye surveys
RAAB was designed to estimate prevalence and causes of blindness and visual impairment in adults aged 50 years and older. A lack of agreed NVIC definitions limits the usefulness and comparability of population-based eye surveys.
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RAAB was designed to estimate prevalence and causes of blindness and visual impairment in adults aged 50 years and older. A lack of agreed NVIC definitions limits the usefulness and comparability of population-based eye surveys.