Which Part of The Eye Helps to Change the Focal Length of the eye - lens Enabling to see Object at all Distance ??
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ciliary muscle is the answer
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The ciliary muscles changes the focal length of eye lens to focus objects at variable distances.
The ciliary muscles hold the lens of human eye which helps it to become thin or think simply it helps the lens to adjust its focal length. When ciliary muscles contract, the lens becomes thin. ... Thus, when any object is at a long distance, the eye lens becomes thin enabling us to see the object clearly.
Bifocal lens is used to see objects at all distance.
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