light adaptation


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light adaptation

n.
The process, chiefly involving constriction of the pupil, by which the eye adapts to an increase in illumination.

light′-a·dapt′ed (-ə-dăp′tĭd) adj.

light′ adapta`tion


n.
the reflex adjustment of the eye to bright light, consisting of a constriction of the pupil, an increase in the number of functioning cones, and a decrease in the number of functioning rods.
[1895–1900]
light′-a•dapt`ed, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.light adaptation - the process of adjusting the eyes to relatively high levels of illumination; the pupil constricts and the cones system is operative
adaptation - (physiology) the responsive adjustment of a sense organ (as the eye) to varying conditions (as of light)
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References in periodicals archive ?
Although Ca2+ modulates virtually every step of the phototransductive cascade, key targets are the channels themselves, leading to: (i) amplification by positive feedback during the rising phase of quantum bumps, (ii) gain reduction by negative feedback during quantum bump termination and during light adaptation.
People living at high latitudes need extreme flexibility in light adaptation," the Karolinska researchers stated.
After 5 min of light adaptation, larvae appeared to be swimming normally, and the light intensity was reduced suddenly by adding fixed neutral-density filters into the light-stimulus system.
The final chapter, for example, ends with a paragraph about light adaptation by Svalbard ptarmigan, which are contrasted to the Emperor penguin.

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