Binocular visual field in adults with horizontal strabismus and driving requirements

Objective To determine the horizontal extent of the binocular visual field (BVF) in subjects with horizontal strabismus and whether the BVF falls below the driving standard. Methods and analysis Adults with congenital esotropia and infantile exotropia ≤45 Prism Dioptres (PD), and subjects with ortho...

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Bibliographic Details
Published in:Eye (London) 2023-08, Vol.37 (11), p.2220-2225
Main Authors: Alfaqawi, Fadi, Young, Jane, Kaye, Stephen B.
Format: Article
Language:English
Subjects:
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Binocular vision
Diplopia
Glaucoma
Laboratory Medicine
Medicine
Medicine & Public Health
Ophthalmology
Owls
Pharmaceutical Sciences/Technology
Strabismus
Surgery
Surgical Oncology
Visual field
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Summary:Objective To determine the horizontal extent of the binocular visual field (BVF) in subjects with horizontal strabismus and whether the BVF falls below the driving standard. Methods and analysis Adults with congenital esotropia and infantile exotropia ≤45 Prism Dioptres (PD), and subjects with orthotropia were recruited. The manifest angle of deviation was measured using a simultaneous prism cover test. Monocular Visual Field (MVF) and BVF were measured using the Esterman visual field test. Subjects with diplopia or a manifest angle of strabismus that varied by>8PD or the present of a vertical tropia >8PD were excluded. Results Forty-nine subjects were included: 10 with orthotropia, 20 with exotropia and 19 with esotropia. The horizontal extent of BVF (degrees) was significantly smaller in esotropes (122.8 ± 18.8) than in orthotropes (141 ± 6.6) or exotropes (138.3 ± 8.3) ( p  
ISSN:0950-222X
1476-5454
DOI:10.1038/s41433-022-02319-5