ArticleJournal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus2021
Dichoptic visual field mapping of suppression in exotropia with homonymous hemianopia.
Article in Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed, 2 citations in OpenAlex.
- Review: Binocular double vision in the presence of visual field loss.Journal of vision · 2024Review
- Peripheral Binocular Imbalance in Anisometropic and Strabismic Amblyopia.Investigative ophthalmology & visual science · 2024Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
backgroundThe purpose of this study was to investigate which portions of the visual scene are perceived by each eye in an exotropic subject with acquired hemianopia. The pattern of suppression is predictable from knowledge of how suppression scotomas are organized in exotropic subjects with intact visual fields.
methodsDichoptic perimetry was performed by having a subject wear red/blue goggles while fixating a cross that was either red or blue. Red, blue, or purple spots were presented briefly at peripheral locations. The subject's identification of the spot color revealed which eye was perceptually engaged at any given location in the visual fields.
resultsA 17-year-old female with a history of exotropia was evaluated after rupture of a right parietal arteriovenous malformation. Dichoptic perimetry showed a left homonymous hemianopia. All stimuli to the right of the right fovea's projection point were perceived via the right eye. Stimuli between the foveal projection points, which were separated horizontally by the 20° exotropia, were perceived by the left eye.
conclusionsPerception of the visual scene is shared by the eyes in hemianopia and exotropia. Suppression occurs only in the peripheral temporal retina of the eye contralateral to the brain lesion, regardless of which eye is engaged in fixation. Although exotropia expands the binocular field of vision in hemianopia, it is probably not an adaptive response, even when it develops after hemianopia.
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