| 释义 |
light adaptation
light adaptationn. 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. Thesaurus| Noun | 1. | light adaptation - the process of adjusting the eyes to relatively high levels of illumination; the pupil constricts and the cones system is operativeadaptation - (physiology) the responsive adjustment of a sense organ (as the eye) to varying conditions (as of light) |
Light adaptation
light adaptation[′līt ‚ad‚ap′tā·shən] (physiology) The disappearance of dark adaptation; the chemical processes by which the eyes, after exposure to a dim environment, become accustomed to bright illumination, which initially is perceived as quite intense and uncomfortable. Light adaptationThe process by which the retina becomes adapted to a luminance greater than about 1.0 foot-lambert.light 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·tionthe 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 adaptationlight adaptationn. 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. LegalSeeAdaptationlight adaptation
Related to light adaptation: dark adaptationWords related to light adaptationnoun the process of adjusting the eyes to relatively high levels of illuminationRelated Words |