The Effect of Light-Flashes during the Course of Dark Adaptation

1938 ◽  
Vol 51 (4) ◽  
pp. 717 ◽  
Author(s):  
E. A. Suchman ◽  
H. P. Weld
Keyword(s):  
Dark Adaptation ◽  
Light Flashes ◽  
Effect Of Light

The Effect of Light-Flashes during the Course of Dark Adaptation

1938 ◽  
Vol 51 (3) ◽  
pp. 540 ◽  
Author(s):  
Laura K. Allen ◽  
Karl M. Dallenbach
Keyword(s):  
Dark Adaptation ◽  
Light Flashes ◽  
Effect Of Light

scholarly journals Variability of interspike intervals in optic nerve fibers of Limulus: effect of light and dark adaptation.

1968 ◽  
Vol 60 (2) ◽  
pp. 464-469 ◽  
Author(s):  
F. Ratliff ◽  
H. K. Hartline ◽  
D. Lange
Keyword(s):  
Optic Nerve ◽  
Dark Adaptation ◽  
Nerve Fibers ◽  
Interspike Intervals ◽  
Effect Of Light

[3H]raclopride and [3H]spiroperidol binding to retinal membranes of the teleost Eugerres plumieri: Effect of light and dark adaptation

1997 ◽  
Vol 31 (4) ◽  
pp. 541-548 ◽  
Author(s):  
Francisco Obregón ◽  
Mary Urbina ◽  
Lucimey Lima
Keyword(s):  
Dark Adaptation ◽  
Effect Of Light

scholarly journals Effect of Light Flashes vs Sham Therapy During Sleep With Adjunct Cognitive Behavioral Therapy on Sleep Quality Among Adolescents

2019 ◽  
Vol 2 (9) ◽  
pp. e1911944 ◽  
Author(s):  
Katherine A. Kaplan ◽  
Meital Mashash ◽  
Rayma Williams ◽  
Holly Batchelder ◽  
Lolly Starr-Glass ◽  
...  
Keyword(s):  
Cognitive Behavioral Therapy ◽  
Sleep Quality ◽  
Behavioral Therapy ◽  
Cognitive Behavioral ◽  
Light Flashes ◽  
Effect Of Light

Effect of light and dark adaptation upon the rhabdom in the compound eye of the mosquito

1978 ◽  
Vol 206 (2) ◽  
pp. 151-156 ◽  
Author(s):  
J. D. Brammer ◽  
Peter J. Stein ◽  
Ronald A. Anderson
Keyword(s):  
Dark Adaptation ◽  
Compound Eye ◽  
Effect Of Light

The effect of light-dark adaptation on the ultrastructure ofLimulus lateral eye retinular cells

1976 ◽  
Vol 107 (1) ◽  
pp. 77-96 ◽  
Author(s):  
Mildred Behrens ◽  
Wolf Krebs
Keyword(s):  
Dark Adaptation ◽  
Lateral Eye ◽  
Retinular Cells ◽  
Effect Of Light

scholarly journals The Duplex Nature of the Retina of the Nocturnal Gecko as Reflected in the Electroretinogram

1961 ◽  
Vol 44 (6) ◽  
pp. 1143-1158 ◽  
Author(s):  
Eberhard Dodt ◽  
Karl Heinz Jessen
Keyword(s):  
Electrical Activity ◽  
Dark Adaptation ◽  
Light Adaptation ◽  
Slow Phase ◽  
Strong Light ◽  
Increment Threshold ◽  
Hemidactylus Turcicus ◽  
Low Levels ◽  
Different Levels ◽  
Effect Of Light

The effect of light and dark adaptation on the electrical activity in two species of nocturnal gecko, Hemidactylus turcicus and Tarentola mauritanica was studied. The electroretinogram of both species changes from the scotopic type in the dark-adapted state to the photopic type after strong light adaptation. For the scotopic response fusion frequencies up to 18 flashes per sec. are obtained in both species. For the photopic response fusion frequencies up to 50 flashes per sec. are seen in Tarentola, and up to 25 flashes per sec. in Hemidactylus. Proceeding from dark to light adaptation the increment threshold (dI) is measured at different levels of adaptive illumination (I). At low levels of illumination the dI/I ratio is found to be small and at high levels of illumination to be large. No difference in the dI/I ratio is obtained for test lights of 462 and 605 mµ. During dark adaptation the change of threshold after exposure to moderate and weak lights (up to 103 times dark threshold) is rather fast. After light adaptation to strong light (106 times dark threshold) duplex dark adaptation curves are seen with a break separating a fast and a slow phase of dark adaptation. The significance of these results from a retina which possesses sense cells of only one type is discussed.

scholarly journals The Function of Photomechanical Movements in the Retina of the Rainbow Trout (Salmo Gairdneri)

1982 ◽  
Vol 96 (1) ◽  
pp. 389-403 ◽  
Author(s):  
R. H. DOUGLAS
Keyword(s):  
Rainbow Trout ◽  
Dark Adaptation ◽  
Visual Pigment ◽  
Time Course ◽  
Temporal Correlation ◽  
Salmo Gairdneri ◽  
Direct Sunlight ◽  
Pigment Concentrations ◽  
Wave Sensitivity ◽  
Effect Of Light

1. The function of photomechanical movements in the retina of rainbow trout (Salmo gairdneri) was investigated by determining both the effect of light on the level of extractable visual pigment, and the electroretinographic b-wave sensitivity, during various stages of photomechanical light and dark adaptation. 2. Dark-adapted fish, light-adapted fish, and dark-adapted fish exposed to ten minutes direct sunlight had on average visual pigment concentrations of 100, 82 and 36% respectively. 3. The intensity of illumination required to bleach a specified amount of visual pigment in the light-adapted retina was found to be 1.29 log units higher than that needed to bleach the same amount of visual pigment in a dark-adapted eye. 4. The level of extractable visual pigment was observed to be relatively constant over natural twilight periods. 5. A close temporal correlation was observed between the time course of electroretinographic adaptation, measured by the b-wave sensitivity, and photomechanical changes. 6. All these observations tend to support the hypothesis that photomechanical movements serve, at least in part, to protect the rod visual pigment from overstimulation in the light-adapted retina.

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