Abstract

The influence of intermittent preadaptation upon subsequent dark adaptation was investigated for six preadaptation durations ranging from 30 seconds to 16 minutes. The rate of intermittence was one cycle/second and four ratios of light-to-dark (plus continuous light) were used. The preadaptation intensity was 1188 mL. The resulting dark adaptation curves show that an increase in the duration of intermittent preadaptation produces an elevation in initial threshold, a prolonging of dark adaptation, and a decrease in the rate at which dark adaptation proceeds. An increase in the light-time of the light-dark ratio will affect dark adaptation in a similar manner.

© 1953 Optical Society of America

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References

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  1. H. K. Müller, Arch. Ophthalmal. Berlin 125, 624 (1931).
  2. C. Haig, J. Gen. Physiol. 24, 735 (1941).
  3. G. Wald and A-B. Clark, J. Gen. Physiol. 21, 93 (1937).
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    [Crossref]
  5. F. A. Mote and E. C. Reed, J. Opt. Soc. Am. 42, 333 (1952).
    [Crossref] [PubMed]
  6. F. A. Mote and E. C. Reed, J. Opt. Soc. Am. 42, 521 (1952).
    [Crossref] [PubMed]
  7. S. Hecht and S. Shlaer, J. Opt. Soc. Am. 28, 269 (1938).
    [Crossref]
  8. Hecht, Haig, and Chase, J. Gen. Physiol. 20, 831 (1937).

1952 (2)

1951 (1)

1941 (1)

C. Haig, J. Gen. Physiol. 24, 735 (1941).

1938 (1)

1937 (2)

Hecht, Haig, and Chase, J. Gen. Physiol. 20, 831 (1937).

G. Wald and A-B. Clark, J. Gen. Physiol. 21, 93 (1937).

1931 (1)

H. K. Müller, Arch. Ophthalmal. Berlin 125, 624 (1931).

Chase,

Hecht, Haig, and Chase, J. Gen. Physiol. 20, 831 (1937).

Clark, A-B.

G. Wald and A-B. Clark, J. Gen. Physiol. 21, 93 (1937).

Haig,

Hecht, Haig, and Chase, J. Gen. Physiol. 20, 831 (1937).

Haig, C.

C. Haig, J. Gen. Physiol. 24, 735 (1941).

Hecht,

Hecht, Haig, and Chase, J. Gen. Physiol. 20, 831 (1937).

Hecht, S.

Mote, F. A.

Müller, H. K.

H. K. Müller, Arch. Ophthalmal. Berlin 125, 624 (1931).

Reed, E. C.

Riopelle, A. J.

Shlaer, S.

Wald, G.

G. Wald and A-B. Clark, J. Gen. Physiol. 21, 93 (1937).

Arch. Ophthalmal. Berlin (1)

H. K. Müller, Arch. Ophthalmal. Berlin 125, 624 (1931).

J. Gen. Physiol. (3)

C. Haig, J. Gen. Physiol. 24, 735 (1941).

G. Wald and A-B. Clark, J. Gen. Physiol. 21, 93 (1937).

Hecht, Haig, and Chase, J. Gen. Physiol. 20, 831 (1937).

J. Opt. Soc. Am. (4)

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Figures (4)

F. 1
F. 1

Dark adaptation curves for the 1 2 1 2 light-dark ratio following 6 durations of preadaptation. Data for two subjects. (Curve 1, Subject G.E.B., displaced upward 1 2 log unit from other curves.)

F. 2
F. 2

Dark adaptation curves for the 1 4 3 4 light-dark ratio following 6 durations of preadaptation. Data for two subjects, Curves numbered as in Fig. 1.

F. 3
F. 3

Dark adaptation curves for all conditions of intermittence (plus continuous light) following 16 minutes preadaptation. Data for two subjects.

F. 4
F. 4

Dark adaptation curves following preadaptation conditions which satisfy the relationship R×t = C. Panel A, curves for R×t = 2 minutes. Panel B, curves for R×t = 8 minutes. Panel C, curves for R×t = 15 seconds. Data for two subjects.