Q:

Adaptation for vision in poor light is

safaTerkawi
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2022-08-10
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 Adaptation for vision in poor light is.

  1. Complete after 2–3 minutes.
  2. Due mainly to dilatation of the pupil.
  3. Due to regeneration of rod but not cone pigments.
  4. Faster if red goggles are worn before entering the dark environment.
  5. More effective for peripheral than central vision.
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safaTerkawi
2022-08-10
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A. False It takes about 20 minutes.

B. False Dilatation of the pupil contributes but regeneration of bleached receptor pigments is the main factor.

C. False Regeneration of cone pigments plays a part.

D. True Red light does not bleach rhodopsin.

E. True Peripheral vision adapts better to dark conditions; rods predominate peripherally

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