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Question
To focus on the nearby objects, lens become
To focus on the nearby objects, lens become
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Solution
The correct option is B convex
The ciliary muscle is a circular band of smooth muscle. The contraction or relaxation of the ciliary muscles changes the tightness of the zonular fibres. It alters the shape of the lens, adapting it for near or far vision.
Lens is an elastic, biconvex living structure which is capable of changing its refractive power.
Nearby objects require more refraction to be focussed on the retina, so the lens becomes more convex due to relaxation of suspensory ligaments.
Faraway objects require less refraction to be focussed on retina, so the lens becomes less convex due to contraction of suspensory ligaments.
The ciliary muscle is a circular band of smooth muscle. The contraction or relaxation of the ciliary muscles changes the tightness of the zonular fibres. It alters the shape of the lens, adapting it for near or far vision.
Lens is an elastic, biconvex living structure which is capable of changing its refractive power.
Nearby objects require more refraction to be focussed on the retina, so the lens becomes more convex due to relaxation of suspensory ligaments.
Faraway objects require less refraction to be focussed on retina, so the lens becomes less convex due to contraction of suspensory ligaments.
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