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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
When you view a close object, your lens gets ___ .
- a. flatter
- b. rounder
- c. darker
- d. cloudier
Introduction: The lens is a transparent and flexible tissue that provides 25-30% of the eye’s focusing power. The lens has ciliary muscles that undergo contraction and relaxation to change the shape of lens and its curvature. Visual accommodation is the process through which the eye changes focus from distant to nearby objects. It is done through action of ciliary muscles attached to the lens.
Reason for the correct statement:
The ciliary muscles adjust the shape of the lens such that the light reflected from the nearby or distant object focuses on the retina. When a close object is focused, the ciliary muscles contract and the lens become rounder.
Hence, option b. is correct.
Reasons for the incorrect statement:
Option a. is given as “flatter”. Lens becomes flatter when light from a distant object is focused on the retina...
Chapter 33 Solutions
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