Open Angle Glaucoma Effects on Preattentive Visual Search (PAVS) Efficiency for Flicker, Motion Displacement and Orientation Pop-out Tasks
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چکیده
Open angle glaucoma effects on preattentive visual search (PAVS) efficiency for flicker, motion displacement and orientation pop-out tasks.
منابع مشابه
Open angle glaucoma effects on preattentive visual search efficiency for flicker, motion displacement and orientation pop-out tasks.
BACKGROUND/AIM Preattentive visual search (PAVS) describes rapid and efficient retinal and neural processing capable of immediate target detection in the visual field. Damage to the nerve fibre layer or visual pathway might reduce the efficiency with which the visual system performs such analysis. The purpose of this study was to test the hypothesis that patients with glaucoma are impaired on p...
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PURPOSE Damage to the nerve fiber layer or visual pathway might be expected to reduce the efficiency with which the visual system performs analysis of the ever-changing field of vision. The purpose of this article is to provide a further analysis of previously reported data (Loughman J, Davison P, Flitcroft I, Br J Ophthalmol 2007;91:1493-98.) to: (i) determine the sensitivity and specificity o...
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BACKGROUND Previous research has shown that several clinical conditions cause increased pre-attentive visual search (PAVS) times, implying reduced parallel search capabilities in glaucoma and DLB dementia. The purpose of the research reported here was to examine for the first time the resistance of PAVS to dioptric blur using targets differing from the background in terms of flicker, vertical d...
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An important component of visual search is the preattentive guidance of attention towards a target item. The purpose of this investigation is to determine a tuning curve for these guidance mechanisms. The experiments utilize an oriented grating to mask preattentive guidance in a visual search for orientation. By systematically varying the orientation of the grating, we expected to determine the...
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PURPOSE It is well known that glaucoma results in performance impairments on tasks processed early in the visual pathways. Glaucoma should also impair cortical visual processing because of reduced input from retinal ganglion cells and also possibly because of abnormal cortical function. This study was undertaken to assess whether cortically processed global percepts are disrupted in glaucoma in...
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تاریخ انتشار 2013