Preattentive Visual Search
von Loughman, James
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Several clinical conditions cause increased pre- attentive visual search (PAVS) times, implying reduced parallel search capabilities in DLB dementia and Parkinson''s disease. This book describes the effect of a number of variables on PAVS performance including optical blur, age, retinal eccentricity and perceptual learning, and critically establishes that the test remains viable in the presence of such potentially confounding variables. importantly, it also describes the efficiency of PAVS in cases of established glaucoma; glaucoma suspects and age- matched normals, determines the differential diagnostic capacity of the current test, and provides diagnostic cut-off performance indices to facilitate clinical categorisation of patients. All investigations indicate that, at the very least, the test provides a simple, rapid and accurate means of screening for the effects of glaucoma. Its capacity to differentiate glaucoma from suspects suggests its diagnostic ability extends beyond that achieved by conventional perimetry.
James is a lecturer and researcher in the Optometry Dept at Dublin Institute of Technology, Ireland. His clinical research addresses AMD, glaucoma and sustainable eyecare development through the Mozambique Eyecare Project. James is National Chair of Optometry Giving Sight Ireland, funding avoidable blindness initiatives in developing nations.
LAP Lambert Academic Publishing
0.228 x 0.15 x 0.022 m; 0.558 kg