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Chemistry of Vision

Which of the ...

Question

Which of the following statement(s) is/are false regarding the adjustment of the eye when viewing objects nearby?

A

Focal length decreases.

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B

Curvature of lens decreases.

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C

Ligaments tend to relax.

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D

Ciliary muscles contract.

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Solution

The correct option is B
Curvature of lens decreases.

The focal length of the eye can be adjusted according to the distance between the eye and the object. In case where the eye wants to see objects that are close, it's focal length decreases, ciliary muscles contract and curvature of the lens increases. These changes help in the formation of a clear image of the nearby object on our retina.

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Similar questions

Q. Which of the following adjustments are made by the eye to enable the clear vision of distant objects?

Q. The ability of an eye to adjust its focal length by itself to see nearby and distant objects is called as ______________.

Q. What are the changes in ciliary muscle when nearby objects and distant objects are viewed?

Q. You are given that the diameter of the eyeball is about

2.3

cm and a normal eye can adjust the focal length of its eye lens to see objects situated anywhere from

25

cm to an infinite distance away from it.

What is the power of the (normal) eye lens, when ciliary muscles are fully relaxed?

What is the power of the (normal)eye lens, when ciliary muscles are in their maximum contract position?

The maximum variation in the power of the eye lens, when it adjusts itself, from the normal relaxed position to the position where the eye can see the nearby object clearly?

Q. State true or false.
When one is seeing things that are nearby, the ciliary muscles contract to decrease the focal length of the eye lens.

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