Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/92698
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dc.contributorSchool of Optometryen_US
dc.creatorTran, KDen_US
dc.creatorLi, BZen_US
dc.creatorAntonucci, MMen_US
dc.creatorNgo, CVen_US
dc.creatorChat, Sen_US
dc.creatorKee, CSen_US
dc.creatorLevi, DMen_US
dc.creatorLi, RWen_US
dc.date.accessioned2022-05-11T06:23:36Z-
dc.date.available2022-05-11T06:23:36Z-
dc.identifier.issn0146-0404en_US
dc.identifier.urihttp://hdl.handle.net/10397/92698-
dc.descriptionThis is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.en_US
dc.language.isoenen_US
dc.publisherAssociation for Research in Vision and Ophthalmologyen_US
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (https://creativecommons.org/licenses/by-nc-nd/4.0/).en_US
dc.rightsThe following publication Tran, K. D., Li, B. Z., Antonucci, M. M., Ngo, C. V., Chat, S., Kee, C. S., ... & Li, R. W. (2016). Astigmatic blur alters the spatial frequency tuning characteristics of stereopsis: magnitude and orientation. Investigative Ophthalmology & Visual Science, 57(12), 1499-1499 is available at https://iovs.arvojournals.org/article.aspx?articleid=2560150en_US
dc.titleAstigmatic blur alters the spatial frequency tuning characteristics of stereopsis : magnitude and orientationen_US
dc.typeOther Conference Contributionsen_US
dc.identifier.volume57en_US
dc.identifier.issue12en_US
dcterms.abstractPurpose : It is well documented that uncorrected astigmatism results in reduced stereoacuity. However, previous studies have used tests that are broadband in their spatial frequency content. Our current study aimed to understand how astigmatism affects the spatial frequency tuning of stereopsis.en_US
dcterms.abstractMethods : The visual stimulus consisted of two horizontally separated square blocks, one presented to each eye. Each block contained a Gabor target patch surrounded by four Gabor reference patches. Binocular disparity was introduced by shifting the two Gabor targets in opposite directions, and a haploscope was used to enable binocular fusion. Stimulus spatial frequency ranged from 1-20 cyc/deg. The visual task was to determine the stereoscopic depth of the Gabor target (in front / behind) relative to the four references. Four young adult observers with normal visual acuity were tested. Plus cylindrical lenses were used to induce astigmatic blur in the two eyes. Appropriate plus lens powers were added to the distance correction in order to prevent accommodation for the viewing distances. Stereothresholds were measured for a range of against-the-rule astigmatism: from 0 to 2 D.en_US
dcterms.abstractResults : The stereoacuity versus spatial frequency function is the inverse of a typical contrast sensitivity function, with the optimum spatial frequency at 5-10 cyc/deg. Increasing the astigmatic blur elevated stereo thresholds selectively at high spatial frequencies, gradually shifting the optimum frequency to lower spatial frequencies. Stereopsis for low frequency targets was only mildly affected even with high astigmatism. We also obtained similar frequency-dependent patterns for oblique astigmatism, but interestingly, the deterioration effects on stereoacuity were not as much as against-the-rule astigmatism. As expected, with-the-rule astigmatism did not substantially affect stereoacuity.en_US
dcterms.abstractConclusions : Here we show that astigmatic blur results in spatial frequency specific losses of stereopsis. These findings have clinical implications for understanding both the sparing of coarse stereopsis and the deficits in fine stereopsis in meridional amblyopia.en_US
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationInvestigative ophthalmology and visual science, Sept. 2016, v. 57, no. 12, 1499 (Abstract)en_US
dcterms.isPartOfInvestigative ophthalmology and visual scienceen_US
dcterms.issued2016-09-
dc.relation.conferenceARVO Annual Meetingen_US
dc.identifier.eissn1552-5783en_US
dc.identifier.artn1499en_US
dc.description.validate202205 bcfcen_US
dc.description.oaMetadata onlyen_US
dc.identifier.FolderNumberSO-0093-
dc.description.fundingSourceOthersen_US
dc.description.fundingTextNIH Granten_US
dc.description.pubStatusPublisheden_US
dc.identifier.OPUS7034492-
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