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Parts of the Eye

A person move...

Question

A person moves from sunlight into a dark room. How do their eyes respond?

A

The blind spot become larger

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B

The blind spot become smaller

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C

The pupil become larger

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D

The pupil become smaller

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Solution

The correct option is B The pupil become larger
When a person moves from sunlight into a dark room, his circular muscles of the eyes relaxes and radial muscle contracts thus the pupil dilates.

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Similar questions

Q. Which of the following changes occur when you walk out of bright sunshine into a poorly lit room ?
(a) the pupil becomes larger (b) the lens becomes thicker
(c) the ciliary muscle relaxes (d) the pupil becomes smaller

Q. (a) Explain the functions of the following parts of the eye:
(i) cornea
(ii) iris
(iii) pupil
(iv) ciliary muscles
(v) eye-lens
(b) If you walk from a dark room into sunlight and back again into dark room, how would your pupils alter in size? What makes this happen?
(c) Explain why, we cannot see our seats first when we enter a darkened cinema hall from bright light but gradually they become visible.

Q. In bright light, your pupils become larger to prevent too much light from entering your eyes.

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(a) the lens moves in or out

(b) the retina moves in or out

(c) the lens becomes thicker or thinner

(d) the pupil becomes larger or smaller

Q. Briefly describe how the following actions take place
(i) The oval window of the inner ear vibrates (ii) The pupil of the eye becomes smaller

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