Meridional amblyopia in monkeys

Contrast sensitivity as a function of the orientation of a grating stimulus was determined by behavioral methods for four rhesus monkeys. Two of the monkeys had been reared with normal binocular experience, had spherical refractive errors, and showed a normal oblique effect. The other two monkeys wh...

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Bibliographic Details
Published in:Experimental brain research 1980-01, Vol.39 (3), p.351-356
Main Authors: Harwerth, R S, Smith, 3rd, E L, Boltz, R L
Format: Article
Language:English
Subjects:
Animals
Dominance, Cerebral
Haplorhini
Macaca mulatta
Male
Orientation
Reaction Time
Refraction, Ocular
Sensory Deprivation
Visual Perception
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Summary:Contrast sensitivity as a function of the orientation of a grating stimulus was determined by behavioral methods for four rhesus monkeys. Two of the monkeys had been reared with normal binocular experience, had spherical refractive errors, and showed a normal oblique effect. The other two monkeys which had been reared with one eyelid sutured (which was still sutured during these experiments), showed astigmatic refractive errors in the non-deprived eye and grating contrast sensitivity as a function of orientation that was correlated with the principal meridians of their astigmatism. Control experiments showed that the meridional amblyopia was not due to an uncorrected refractive error. Reaction time measures of contrast sensitivity for suprathreshold grating patterns showed that meridional amblyopia was not present for high contrast gratings.
ISSN:0014-4819
1432-1106
DOI:10.1007/BF00237124