Screening Older Adults for Impaired Visual Acuity: A Review of the Evidence for the U.S. Preventive Services Task Force

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   Appendix Figure. Analytic framework and key questions.

   KQ = key question.
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   Figure. Study flow diagram.

   AMD = age-related macular degeneration; KQ = key question; RCT = randomized, controlled trial; SR = systematic review; URE = uncorrected refractive error. * Cochrane Central Register of Controlled Trials and Cochrane Database of Systematic Reviews. † Identified from reference lists suggested by experts. ‡ Some studies were included for >1 KQ.