The Flash-lag Effect in Amblyopia.
Journal
Investigative ophthalmology & visual science
ISSN: 1552-5783
Titre abrégé: Invest Ophthalmol Vis Sci
Pays: United States
ID NLM: 7703701
Informations de publication
Date de publication:
01 02 2021
01 02 2021
Historique:
entrez:
18
2
2021
pubmed:
19
2
2021
medline:
21
7
2021
Statut:
ppublish
Résumé
Amblyopes suffer a defect in temporal processing, presumably because of a neural delay in their visual processing. By measuring flash-lag effect (FLE), we investigate whether the amblyopic visual system could compensate for the intrinsic neural delay due to visual information transmissions from the retina to the cortex. Eleven adults with amblyopia and 11 controls with normal vision participated in this study. We assessed the monocular FLE magnitude for each subject by using a typical FLE paradigm: a bar moved horizontally, while a flashed bar briefly appeared above or below it. Three luminance contrasts of the flashed bar were tested: 0.2, 0.6, and 1. All participants, controls and those with amblyopia, showed a typical FLE. However, the FLE magnitude of participants with amblyopia was significantly shorter than that of the control participants, for both their amblyopic eye (AE) and fellow eye (FE). A nonsignificant difference was found in FLE magnitude between the AE and the FE. We demonstrate a reduced FLE both in the AE as well as the FE of patients with amblyopia, suggesting a global visual processing deficit. We suggest it may be attributed to a more limited spatiotemporal extent of facilitatory anticipatory activity within the amblyopic primary visual cortex.
Identifiants
pubmed: 33599734
pii: 2772297
doi: 10.1167/iovs.62.2.23
pmc: PMC7900860
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
23Subventions
Organisme : CIHR
ID : CCI-125686
Pays : Canada
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