| Contrast sensitivity benefit of adaptive optics correction of ocular aberrations. | |
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MedLine Citation:
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PMID: 21985781 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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While correcting the aberrations of the eye produces large increases in retinal image contrast, the corresponding improvement factors in the contrast sensitivity function have been little explored and results are controversial. We measured the CSF of 4 subjects with and without correcting monochromatic aberrations. Monochromatic CSF measurements were performed at four orientations (0, 45, 90, and 135 deg) and at six spatial frequencies (2-30 c/deg). In two subjects, the CSF was also measured in polychromatic light. The MTF increased on average by 8 times and meridional changes in improvement were associated to individual meridional changes in the natural MTF. CSF increased on average by 1.35 times (only for the mid- and high spatial frequencies) and was lower (0.93 times) for polychromatic light. Under natural aberrations, the horizontal and vertical CSFs tended to be higher than the oblique CSFs, but the meridional differences in the CSF were partially reduced when the aberrations were corrected. The consistently lower benefit in the CSF than in the MTF of correcting aberrations suggests a significant role for the neural transfer function in the limit of contrast perception. Polychromatic aberrations play an additional role in degrading contrast, particularly in the absence of monochromatic high-order aberrations. |
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Authors:
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Pablo de Gracia; Susana Marcos; Ankit Mathur; David A Atchison |
Publication Detail:
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Type: Journal Article Date: 2011-10-10 |
Journal Detail:
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Title: Journal of vision Volume: 11 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2011 |
Date Detail:
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Created Date: 2011-10-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
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Languages: eng Pagination: - Citation Subset: IM |
Affiliation:
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Instituto de Óptica, Consejo Superior de Investigaciones Científicas, CSIC, Madrid, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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