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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 47, Iss. 4 — Apr. 1, 1957
  • pp: 287–290

Changing Pre-Exposure and Dark Adaptation

F. A. MOTE and LYMAN M. FORBES  »View Author Affiliations

JOSA, Vol. 47, Issue 4, pp. 287-290 (1957)

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The dark adaptation of two subjects was measured following pre-exposures that changed from zero to maximum intensity and the reverse, from maximum to zero, as well as for equivalent unchanging pre-exposures. Three intensities and four durations of pre-exposure were investigated. The main effects found were between the two changing conditions: for most of these the zero to maximum intensity resulted in higher initial thresholds and longer times to reach the final dark-adapted threshold than the equivalent condition in which the pre-exposure was from maximum to zero.

F. A. MOTE and LYMAN M. FORBES, "Changing Pre-Exposure and Dark Adaptation," J. Opt. Soc. Am. 47, 287-290 (1957)

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  1. K. J. W. Craik and M. D. Vernon, Brit. J. Psychol. 32, 62–81 (1941).
  2. E. Wolf and M. J. Zigler, J. Opt. Soc. Am. 44, 875–879 (1954).

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