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If the light ...

Question

If the light source infront of an eye becomes bright suddenly

A

Focus of lens will change

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B

Retinal blood supply will cut

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C

Vitreous humour becomes fluid

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D

Pupil will contract

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Solution

The correct option is D Pupil will contract
In response to sudden bright light, pupil constricts by the constriction of sphincter papillae muscles through parasympathetic nervous system, in order to protect retina from possible injury against bright light.

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