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Automatic compensation enhances the orientation perception in chronic astigmatism

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Title
Automatic compensation enhances the orientation perception in chronic astigmatism
Author(s)
Sangkyu Son; Won Mok Shim; Kang, Hyungoo; Joonyeol Lee
Publication Date
2022-03
Journal
Scientific reports, v.12, no.1, pp.1 - 11
Publisher
NLM (Medline)
Abstract
© 2022. The Author(s).Astigmatism is a prevalent optical problem in which two or more focal points blur the retinal image at a particular meridian. Although many features of astigmatic vision, including orientation perception, are impaired at the retinal image level, the visual system appears to partly restore perceptual impairment after an extended period of astigmatism. However, the mechanism of orientation perception restoration in chronic astigmatism has not yet been clarified. We investigated the notable reduction of perceptual error in chronic astigmatism by comparing the orientation perception of a chronic astigmatism group with the perception of a normal-vision group, in which astigmatism was transiently induced. We found that orientation perception in the chronic group was more accurate than in the normal vision group. Interestingly, the reduction of perceptual errors was automatic; it remained even after the optical refractive errors were fully corrected, and the orientation perception was much more stable across different orientations, despite the uneven noise levels of the retinal images across meridians. We provide here a mechanistic explanation for how the compensation of astigmatic orientation perception occurred, using neural adaptation to the biased distribution of orientations.
URI
https://pr.ibs.re.kr/handle/8788114/11334
DOI
10.1038/s41598-022-07788-y
ISSN
2045-2322
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > 1. Journal Papers (저널논문)
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