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Cataract and Glaucoma Case Detection for Vision 2020 Programs in Africa: An Evaluation of 6 Possible Screening Tests
Journal of Glaucoma, 10/05/09

Cook C et al. – Testing the pinhole visual acuity using a cut point of 6/18 in 1 or both eyes has a sensitivity and specificity greater than 90%, a positive likelihood ratio greater than 10.0, a negative likelihood ratio less than 0.1, and an accuracy greater than 90% for case detection of cataract or glaucoma. Examination of the optic disk with a lens free direct ophthalmoscope using a cut point of 0.7 for the vertical cup:disk ratio combined with testing for an afferent pupil defect has similar values for case detection of glaucoma. These tests may be suitable for use in Vision 2020 programs in Africa.

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