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http://hdl.handle.net/10397/88577
Title: | Reduced sampling efficiency causes degraded Vernier hyperacuity with normal aging : vernier acuity in position noise | Authors: | Li, RW Brown, B Edwards, MH Ngo, CV Chat, SW Levi, DM |
Issue Date: | 5-Mar-2012 | Source: | Scientific reports, 5 Mar. 2012, , v. 2, 300, p. 1-6 | Abstract: | Vernier acuity, a form of visual hyperacuity, is amongst the most precise forms of spatial vision. Under optimal conditions Vernier thresholds are much finer than the inter-photoreceptor distance. Achievement of such high precision is based substantially on cortical computations, most likely in the primary visual cortex. Using stimuli with added positional noise, we show that Vernier processing is reduced with advancing age across a wide range of noise levels. Using an ideal observer model, we are able to characterize the mechanisms underlying age-related loss, and show that the reduction in Vernier acuity can be mainly attributed to the reduction in efficiency of sampling, with no significant change in the level of internal position noise, or spatial distortion, in the visual system. | Publisher: | Nature Publishing Group | Journal: | Scientific reports | EISSN: | 2045-2322 | DOI: | 10.1038/srep00300 | Rights: | This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ The following publication Li, R., Brown, B., Edwards, M. et al. Reduced sampling efficiency causes degraded Vernier hyperacuity with normal aging: Vernier acuity in position noise. Sci Rep 2, 300 (2012) is available at https://dx.doi.org/10.1038/srep00300 |
Appears in Collections: | Journal/Magazine Article |
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