Abstract

At the beginning of dark adaptation there is a sudden decrease of threshold that appears distinct from the subsequent course of regular dark adaptation. The present research indicates that the decrease cannot be a result of losing the lateral inhibitory effects that occurred during the light adaptation prior to dark adaptation. The results thus imply that the early threshold drop must be based on a process somewhere in the direct line from receptor to higher centers.

© 1973 Optical Society of America

Early Dark Adaptation to Dim Luminances*

Howard D. Baker, Michael D. Doran, and Knox E. Miller
J. Opt. Soc. Am. 49(11) 1065-1070 (1959)

The Instantaneous Threshold and Early Dark Adaptation*

Howard D. Baker
J. Opt. Soc. Am. 43(9) 798-803 (1953)

Photopic Mechanisms of Early Dark Adaptation*

Edward J. Rinalducci
J. Opt. Soc. Am. 58(5) 690-696 (1968)

Initial Stages of Dark and Light Adaptation*†

Howard D. Baker
J. Opt. Soc. Am. 53(1) 98-103 (1963)

Changes in the Human Electroretinogram during Early Dark Adaptation*

Heiichiro Kawabata
J. Opt. Soc. Am. 53(3) 386-390 (1963)