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Question
Adjusting the focal length of the eye lens to view objects at different distances is done by ______.
Options
Cornea
Iris
Ciliary muscles
Sclera
Solution
Adjusting the focal length of the eye lens to view objects at different distances is done by ciliary muscles.
Explanation:
Ciliary muscles both contract and relax to respectively make the eye lens thicker and flattening. This alters the eye lens's focus length and enables variable distance object viewing.
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