Quantitative perimetry under binocular viewing conditions in microstrabismus

In order to elucidate the type, size and depth of suppression scotomata in microstrabismus and small angle convergent strabismus, we performed binocular static perimetry in 14 subjects with strabismus and four normal observers. The strabismuc cases had an objective angle of convergent squint between...

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Bibliographic Details
Published in:Vision research (Oxford) 1997-10, Vol.37 (19), p.2801-2812
Main Authors: Joosse, M.V., Simonsz, H.J., Van Minderhout, H.M., De Jong, P.T.V.M., Noordzij, B., Mulder, P.G.H.
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Esotropia
Esotropia - physiopathology
Female
Humans
Male
Medical sciences
Microstrabismus
Oculomotor disorders
Ophthalmology
Perimetry
Scotoma - etiology
Strabismus - complications
Strabismus - physiopathology
Suppression scotoma
Vision, Binocular - physiology
Vision, Monocular - physiology
Visual Field Tests
Visual fields
Visual Fields - physiology
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Summary:In order to elucidate the type, size and depth of suppression scotomata in microstrabismus and small angle convergent strabismus, we performed binocular static perimetry in 14 subjects with strabismus and four normal observers. The strabismuc cases had an objective angle of convergent squint between 1 and 8 deg, visual acuity between 0.1 and 1.25, and limited stereopsis. During testing the subjects fused pictures on two Friedmann visual field analyzers. Right and left eyes were studied separately under both monocular and binocular viewing conditions. In five strabismus a suppression scotoma was found in the squinting eye, with a diameter of 5–30 deg and a depth ranging from 4 to 14 dB. No suppression scotomata could be detected in the nine other subjects nor in the four normal observers. In conclusion, only 36% of subjects with strabismus were found to have a suppression scotoma. These scotomata were centered around the fixation point of the squinting eye, in some cases also encompassing the foveal area, and varying in depth and size.
ISSN:0042-6989
1878-5646
DOI:10.1016/S0042-6989(97)00067-9