| Flocks | Milton, U.S. Ophthalmologist, *1914. See: Harrington-Flocks test. (05 Mar 2000) |
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| Harrington-Flocks test | A rapid screening test for visual field defects; patterns are viewed tachistoscopically, and the patterns are visible only when illuminated by a flash of ultraviolet light. Not available since 1970. (05 Mar 2000) |
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