Accession Number:

AD0257951

Title:

CONVERGENCE AS A CUE TO ABSOLUTE DISTANCE

Descriptive Note:

Corporate Author:

ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s):

Report Date:

1961-05-17

Pagination or Media Count:

16.0

Abstract:

The role of convergence and accommodation in the perception of absolute distance was investigated. Perceived absolute distance was measured by using a visual ruler consisting of a monocularly viewed alley. The apparent distance of a binocular object was judged with respect to the monocular alley for convergence values of 4 degrees or less. With accommodation held constant, only a few subjects perceived different distances for different convergence values. With both absolute accommodation and accommodative differences in agreement with convergence, the proportion of subjects who could make this discrimination increased. In general, the results indicate the inadequacy of convergence as a cue to perceived absolute distance for the range of convergence values used in this study. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE