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Optics and neural adaptation jointly limit human stereovision.

ABSTRACT: Stereovision is the ability to perceive fine depth variations from small differences in the two eyes' images. Using adaptive optics, we show that even minute optical aberrations that are not clinically correctable, and go unnoticed in everyday vision, can affect stereo acuity. Hence, the human binocular system is capable of using fine details that are not experienced in everyday vision. Interestingly, stereo acuity varied considerably across individuals even when they were provided identical perfect optics. We also found that individuals' stereo acuity is better when viewing with their habitual optics rather than someone else's (better) optics. Together, these findings suggest that the visual system compensates for habitual optical aberrations through neural adaptation and thereby optimizes stereovision uniquely for each individual. Thus, stereovision is limited by small optical aberrations and by neural adaptation to one's own optics.

SUBMITTER: Ng CJ

PROVIDER: S-EPMC8201763 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Optics and neural adaptation jointly limit human stereovision.

Ng Cherlyn J CJ Blake Randolph R Banks Martin S MS Tadin Duje D Yoon Geunyoung G

Proceedings of the National Academy of Sciences of the United States of America 20210601 23

Stereovision is the ability to perceive fine depth variations from small differences in the two eyes' images. Using adaptive optics, we show that even minute optical aberrations that are not clinically correctable, and go unnoticed in everyday vision, can affect stereo acuity. Hence, the human binocular system is capable of using fine details that are not experienced in everyday vision. Interestingly, stereo acuity varied considerably across individuals even when they were provided identical per ...[more]

PMID: 34074775

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