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  • Title: Evaluation of the oculo-kinetic perimetry glaucoma screening test in a sub-Saharan African setting.
    Author: Mahmoud AO, Omalase CO, Ekundayo K.
    Journal: West Afr J Med; 2008 Jul; 27(3):134-8. PubMed ID: 19256315.
    Abstract:
    BACKGROUND: The oculo-kinetic perimetry glaucoma screening test (OKPGST) simplifies testing for glaucoma. Despite its acceptable degree of efficiency and practicability, its usage in sub-Saharan African appears limited. OBJECTIVE: To evaluate and compare the oculo-kinetic perimetry glaucoma screening chart against automated perimetry and clinical criteria in screening for glaucoma in a sub-Sahara African setting. METHODS: In the first stage, the test was conducted on selected eyes with reproducible glaucomatous visual field detects on perimetry with the KOWA AP125 central visual field plotter, and also in their age-matched controls. During the second stage at the rural outreach health posts, patients with clinically diagnosed primary open angle glaucoma (intraocular pressure of > 21mmHg and a cup/disc ratio > 0.5), and their age-matched controls were also screened with the test. RESULTS: The test was positive in 107 of the 113 eyes with glaucomatous field loss on automated perimetry; and inaccurate in 2 of the 98 control eyes, giving a sensitivity of 94.7%, specificity of 98%, and an efficiency of 96.2%. Among patients with clinically diagnosed glaucoma at the rural health posts, the test was positive in 61 of 65 eyes, while it was inaccurate in 2 of 62 eyes of control patients, giving a sensitivity of 93.8%, specificity 96.8%, and an efficacy of 99.2%. CONCLUSION: The oculo-kinetic perimetry glaucoma screening test with the KOWA performed well, using the KOWA automated perimeter as a standard. It is a convenient, rapid, reliable and inexpensive screening tool in diagnosing primary open angle glaucoma in rural health establishments where conventional perimeters are lacking.
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