In the human eye, the focussing is done by:

1)to and fro movement of the eye lens

2)to and fro movements of the retine

3)change in the convexity of the eye lens

4)change in the refrective index of the eye fluids

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    change in the convexity of the eye lens

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  • Exam: Light QUESTIONS

    To fro moments of retina

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