Abstract

The scotopic sensitivity of three subjects was tested weekly over the course of a year. In addition, two measures were made to indicate each subject’s amount of exposure to sunlight. Scotopic sensitivity was found to be poorest in the summer months, when exposure to sunlight was greatest, and to increase gradually during the fall and winter. The course of sensitivity over the year agreed well with the external measures of exposure to sunlight, the best single measure being the amount of “blue” light reflected by the skin.

© 1960 Optical Society of America

Effect of Differential Binocular Adaptation on Scotopic Acuity

S. M. Luria and Ira Schwartz
J. Opt. Soc. Am. 50(3) 251-253 (1960)

Change of Threshold during Light and Dark Adaptation Following Exposures to Spectral Lights of Equal Scotopic and Equal Photopic Efficiencies*

Eberhard Dodt and Karl-Heinz Jessen
J. Opt. Soc. Am. 51(11) 1269-1274 (1961)

Effect of Red vs White Adaptation and Target Illumination on the Temporal Course of Scotopic Acuity

S. M. Luria and Ira Schwartz
J. Opt. Soc. Am. 50(11) 1075-1080 (1960)

Development of scotopic sensitivity and the absorption spectrum of the human ocular media

John S. Werner
J. Opt. Soc. Am. 72(2) 247-258 (1982)

Studies on Dark Adaptation. III. Pre-Exposure Tolerance of the Human Fovea as Measured by Contrast Sensitivity*†

Joseph W. Wulfeck, Dorothea E. Johannsen, and Patricia I. McBride
J. Opt. Soc. Am. 50(6) 556-558 (1960)