Zhou, Jiawei, McNeal, Suzanne, Babu, Raiju J. et al. (3 more authors) (2014) Time Course of Dichoptic Masking in Normals and Suppression in Amblyopes. Investigative ophthalmology & visual science. pp. 4098-4104. ISSN 0146-0404
Abstract
Purpose: To better understand the relationship between dichoptic masking in normal vision and suppression in amblyopia we address three questions: First, what is the time course of dichoptic masking in normals and amblyopes? Second, is interocular suppression low-pass or band-pass in its spatial dependence? And third, in the above two regards, is dichoptic masking in normals different from amblyopic suppression? Methods: We measured the dependence of dichoptic masking in normal controls and amblyopes on the temporal duration of presentation under three conditions; monocular (the nontested eye—i.e., dominant eye of normals or nonamblyopic eye of amblyopes, being patched), dichoptic-luminance (the nontested eye seeing a mean luminance—i.e., a DC component) and dichoptic-contrast (the nontested eye seeing high-contrast visual noise). The subject had to detect a letter in the other eye, the contrast of which was varied. Results: We found that threshold elevation relative to the patched condition occurred in both normals and amblyopes when the nontested eye saw either 1/f or band-pass filtered noise, but not just mean luminance (i.e., there was no masking from the DC component that corresponds to a channel responsive to a spatial frequency of 0 cyc/deg); longer presentation of the target (corresponding to lower temporal frequencies) produced greater threshold elevation. Conclusions: Dichoptic masking exhibits similar properties in both subject groups, being low-pass temporally and band-pass spatially, so that masking was greatest at the longest presentation durations and was not greatly affected by mean luminance in the nontested eye.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Copyright 2014 The Association for Research in Vision and Ophthalmology, Inc. |
Keywords: | amblyopia,suppression,dichoptic masking,spatial,temporal,presentation duration |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Psychology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 15 Aug 2016 11:30 |
Last Modified: | 16 Oct 2024 12:25 |
Published Version: | https://doi.org/10.1167/iovs.14-13969 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1167/iovs.14-13969 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:103302 |