Perimetry in Normal and Monocularly Pattern-Deprived Cats

Synopsis: The methods shown were developed during study of the effects of monocular visual deprivation. From the age of eight months the cats were forced to use their deprived eye. The cat is conditioned to a noise indicating the position of a food pellet; the position of the noise becomes the fixation point of the cat and the cat will normally run directly to this point when the hand in front of its eye is moved. When the pellet is elsewhere than at the fixation point, the cat will go directly to it only if it is in the visual field. Use of smell as a cue is disproved by tests which show that when blindfolded the cat is guided solely by the position of the noise stimulus. Perimetry in both the horizontal and vertical plane is shown, using both monocularly deprived and normal cats. The respective visual fields and typical deficits are shown both behaviourally and in a diagrammatic presentation.
Language: English
Country: Great Britain
Medium: Film; Film. 16mm. sd. b&w. 17 min.
Technical information: Black-and-white / Sound
Year of production: 1974
Availability: Hire
Subjects: Biology; Psychology
Keywords: cats; visual perception

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