Question

Explain the function of (i) Iris (ii) Pupil (iii) Retina
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Answer 1

Answer:

The iris regulats the size of the pupil which controls how much light is allowed to enter the eye 3)Behind the pupil is the lens that focuses light (or an image) onto retina. 4) The retina contains many photoreceptor cell that convert light into electric signals

Explanation:

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Answer 2

(I) it is a opaque circular daiphragm located behind cornea
ii. Its a small hole located indside the iris.it controls the amount of light entering our eye.
(iii) it is a delicate membrane.it consists of light senstive cells called rods and cons
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