Who's afraid of prevention of blindness?
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D001766:Blindness / Q000517:prevention & control*; D002386:Cataract / Q000517:prevention & control*; D002387:Cataract Extraction / Q000592:standards; D004502:Education, Medical, Continuing; D006297:Health Services Accessibility / Q000592:standards; D006801:Humans; D009885:Ophthalmology / Q000639:trends*