When focusing on nearby objects, the highlighted structure: .
1. becomes flatter
2. gains fluid from surrounding aqueous humor
3. does not change shape
4. becomes rounder

The correct option is;

4. becomes rounder

Explanation:

The ciliary muscles in the eye controls the shape of the lens when looking at objects located at different positions. A close by object such as a book that appears large and the eye has to capture the light from wide angles and therefore the lens is made more rounded to enable the light rays to be focused for viewing.

Similarly when looking at far objects, the lens changes to become more planar.

Accommodation is the term used to describe the ability of the eye lens to change its focus and shape.

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