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Visual Acuity
Vision, Ocular
Eyeglasses
Blindness
Cataract
Vitamin A Deficiency
Presbyopia
Retinopathy of Prematurity
Refractive Errors
Vision Disorders
Prevalence
Age Distribution
Developing Countries
Cross-Sectional Studies
Tanzania
Vision Screening
CD4 Lymphocyte Count
Cataract Extraction
Data Collection
Ophthalmology
Co-Publications
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3
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