Many people believe they can read better in bright light than in dim light. Is t

Question

Many people believe they can read better in bright light than in dim light. Is this true?
(a) Yes, because bright light increases the magnification provided by the cornea and crystalline lens.
(b) No, this is a purely psychological effect, since the optical properties of the eye are not dependent on the light used. Bright light merely stimulates some visual nerons that are normally dormant.
(c) Yes, this is true because contraction of the pupil in bright light reduces spherical aberration
(d) No, because contraction of the pupil in bright light means the same amount of light strikes the retina, and hence the nature of the image formed is unchanged.

Explanation / Answer

(c) Yes, this is true because contraction of the pupil in bright light reduces spherical aberration Visual acuity is much better in bright light than dim light, but magnification remains the same.

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