Relaxation of the ciliary muscles causes the focal length of the eye lens to ________

remain constant

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increase

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decrease

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None of the above

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Solution

The correct option is B
increase

When ciliary muscles are relaxed, then the focal length of eye lens increases.
When the muscles are relaxed, the lens becomes thin. Thus, it's focal length increases.
This enables us to see distant objects clearly.

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Similar questions

Relaxation of the ciliary muscles causes the focal length of eye lens to:

The change in focal length of an eye lens is caused by the action of the

(a) pupil

(b) retina

(d) iris

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