Abstract

A repetition and extension of L. C. Thomson’s study of the influence of “light history” on the course of dark adaptation has confirmed the finding that a longer time is required to reach stable light adaptation than some writers have stated. The differences in scotopic sensitivity following two conditions of initial adaptation persisted until 15 or 20 min of a second light stimulus had intervened. The course of adaptation to the intervening light can be traced in terms of the time in dark required to reach a given level of sensitivity.

© 1957 Optical Society of America

Studies of Rod-Process to Suprathreshold Light Stimuli with a Direct Current Method

Daizo Yonemura and Ryuichi Nango
J. Opt. Soc. Am. 47(9) 822-827 (1957)

Effects of Exposure to Various Red Lights upon Subsequent Dark Adaptation Measured by the Method of Constant Stimuli

Stanley W. Smith, A. Morris, and Forrest L. Dimmick
J. Opt. Soc. Am. 45(7) 502-506 (1955)

Changing Pre-Exposure and Dark Adaptation

F. A. Mote and Lyman M. Forbes
J. Opt. Soc. Am. 47(4) 287-290 (1957)

On Responses in the Human Visual System as a Function of Adaptation Level*

Robert M. Boynton and Gillray Kandel
J. Opt. Soc. Am. 47(4) 275-286 (1957)

Response of the Human Eye to Sudden Changes in the Wavelength of Stimulation

William R. Biersdorf and John C. Armington
J. Opt. Soc. Am. 47(3) 208-215 (1957)