OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 41, Iss. 2 — Feb. 1, 1951
  • pp: 130–131

Dark Adaptation Level and Duration of Testflash

ERNST WOLF and MICHAEL J. ZIGLER  »View Author Affiliations

JOSA, Vol. 41, Issue 2, pp. 130-131 (1951)

View Full Text Article

Acrobat PDF (550 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Using a testfield subtending a visual angle of 5 degrees, dark adaptation functions were obtained with six test-exposures (1.0, 0.5, 0.1, 0.04, 0.02, and 0.01 sec) both from the central retina, and from the temporal parafovea. The functions for both retinal locations were found to vary systematically in relation to duration of testflash. With increasing test-exposure time, the final cone levels as well as the final rod levels are at lower threshold brightnesses. The sensitivity for a given test-exposure time is greater in the central retina than in the parafovea for the photopic range of vision, whereas the sensitivity for the scotopic.range is greater in the parafovea than in the central retina.

ERNST WOLF and MICHAEL J. ZIGLER, "Dark Adaptation Level and Duration of Testflash," J. Opt. Soc. Am. 41, 130-131 (1951)

Sort:  Author  |  Journal  |  Reset


  1. H. Piper, Z. Psychol. und Physiol. d. Sinnesorgane 31, 161 (1903).
  2. Hecht, Haig, and Wald, J. Gen. Physiol. 19, 321 (1935).
  3. A. Kohlrausch, Arch. ges. Physiol. 196, 113 (1922); M. Schultze, Arch. f. mikrosk. Anat. II. S. 175 (1866).
  4. Zigler, Wolf, and King (to be published).
  5. Hecht, Haig, and Chase, J. Gen. Physiol. 20, 831 (1937).
  6. E. Wolf and M. J. Zigler, J. Opt. Soc. Am. 40, 211 (1950).
  7. E. Wolf, Trans. Am. Acad. Ophthalmol. Otol. 1949, p. 400.
  8. W. J. Crozier and A. H. Holway, J. Gen. Physiol. 22, 341 (1939).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited