light adaptation


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Related to light adaptation: dark adaptation

adaptation

 [ad″ap-ta´shun]
1. a dynamic, ongoing, life-sustaining process by which living organisms adjust to environmental changes.
2. adjustment of the pupil to light.
biological adaptation the adaptation of living things to environmental factors for the ultimate purpose of survival, reproduction, and an optimal level of functioning.
color adaptation
1. changes in visual perception of color with prolonged stimulation.
2. adjustment of vision to degree of brightness or color tone of illumination.
dark adaptation adaptation of the eye to vision in the dark or in reduced illumination.
light adaptation adaptation of the eye to vision in the sunlight or in bright illumination (photopia), with reduction in the concentration of the photosensitive pigments of the eye.
physiological adaptation the ongoing process by which internal body functions are regulated and adjusted to maintain homeostasis in the internal environment.
psychological adaptation the ongoing process, anchored in the emotions and intellect, by which humans sustain a balance in their mental and emotional states of being and in their interactions with their social and cultural environments.
social adaptation adjustment and adaptation of humans to other individuals and community groups working together for a common purpose.

light ad·ap·ta·tion

the visual adjustment occurring under increased illumination in which the retinal sensitivity to light is reduced.
See also: light-adapted eye, Purkinje shift.
Synonym(s): photopic adaptation

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 ad·ap·ta·tion

(līt ad'ap-tā'shŭn)
The visual adjustment occurring under increased illumination in which the retinal sensitivity to light is reduced.
See also: light-adapted eye
Synonym(s): photopic adaptation.
References in periodicals archive ?
However, the functional form of the V/log I curves remained the same for all treatments with this specimen; model slopes (m) were from 0.722 to 0.796, and dynamic ranges were from 3.22 to 3.55 log photons [cm.sup.-2] [s.sup.-1], showing no apparent trend with light adaptation.
plebs have shown that light adaptation at 0 [degrees]C and an increase in temperature to 10 [degrees]C in the dark cause similar migrations of screening pigment granules in retinular cells, but microvillar damage absent under light adaptation was severe in the dark at 10 [degrees]C (Meyer-Rochow and Tiang, 1979, 1982).
plebs photoreceptors did not increase significantly with light adaptation (Table 1).
In contrast to light adaptation, photoreceptor response dynamics did increase with temperature.
Effects of light adaptation on the temporal resolution of deep-sea crustaceans.

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