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Subjective Refraction Test Using a Smartphone for Vision Screening
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Blindness and visual impairment due to uncorrected refractive error in sub-Saharan Africa: review of recent

Justin C Sherwin1, Susan Lewallen, Paul Courtright

  • 1Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK.

The British Journal of Ophthalmology
|February 10, 2012
PubMed
Abstract

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