| Influence of Background Complexity on Visual Sensitivity and Binocular Summation Using Patterns With and Without Noise. | |
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MedLine Citation:
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PMID: 22167098 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Purpose:To investigate how background complexity influences visual sensitivity and binocular summation.Methods:Using two noise backgrounds (noise-sparse and noise-dense) and two corresponding noise-free backgrounds with same luminance of each noise background, monocular and binocular thresholds were measured in six visually normal subjects (average age, 27.3 ± 1.1 years). The noise-sparse and noise-dense backgrounds respectively had 312 and 936 white-light dots projected on the background and used the same white-light dots with a size of 0.431° of visual angle that was the same size used for the white-spot target in the threshold measurement. The target was tested at the fovea and at 3° intervals on the 45°, 135°, 225° and 315° meridians. A total of 25 locations were tested.Results:The monocular threshold for the noise-dense background was higher than that for its corresponding noise-free background with significant differences seen at 15° and 18° (P < 0.01). No significant differences in the binocular threshold were seen either between the noise-dense and its corresponding backgrounds or between the noise-sparse and its corresponding backgrounds. The binocular summation ratios for both noise backgrounds were significantly higher than the ratios for the noise-free backgrounds, and the difference increased with eccentricity with significances seen at 15° and 18° (P < 0.01).Conclusions:Only the monocular threshold increased with background complexity. The binocular summation increased with background complexity in the periphery. When the background has become more complex and the monocular visual processing has reached its limit, binocular interaction functions efficiently. |
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Authors:
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Akemi Wakayama; Chota Matsumoto; Kazuyo Ohmure; Masahiko Inase; Yoshikazu Shimomura |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-13 |
Journal Detail:
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Title: Investigative ophthalmology & visual science Volume: - ISSN: 1552-5783 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7703701 Medline TA: Invest Ophthalmol Vis Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Ophthalmology, Kinki University Faculty of Medicine. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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