Abstract

Stereoscopic thresholds were determined for viewing distances of 0.5 meter and 10 meters in an instrument which essentially eliminates empirical factors to visual depth discrimination. The results with three observers show that there is no change in stereoscopic acuity at these two distances. On the basis of this result, data from a particular experiment reported in the literature which seemed to show an increase in stereoscopic acuity with increase in viewing distance were examined. It is shown that the results obtained might be better explained entirely on the basis of an empirical factor that depends upon the least perceptible difference in the angular sizes of two test objects of equal size and form set at different distances.

© 1958 Optical Society of America

Variation of Stereoscopic Acuity with Observation Distance

George Amigo
J. Opt. Soc. Am. 53(5) 630-635 (1963)

Interrelation of Monocular and Binocular Acuities in the Making of an Equidistance Judgment

George S. Harker
J. Opt. Soc. Am. 48(4) 233-240 (1958)

Stereoscopic Acuity and the Role of Convergence*

Kenneth N. Ogle
J. Opt. Soc. Am. 46(4) 269-273 (1956)

Commonplace Viewing and Depth Discrimination

Warren H. Teichner, John L. Kobrick, and E. Ralph Dusek
J. Opt. Soc. Am. 45(11) 913-920 (1955)

Precision and Validity of Stereoscopic Depth Perception from Double Images*

Kenneth N. Ogle
J. Opt. Soc. Am. 43(10) 906-913 (1953)