(a) List the parts of the human eye that control the amount of light entering into it. Explain
how they perform this function.
(b) Write the function of retina in human eye.
(c) Do you know that the corneal-impairment can be cured by replacing the defective cornea
with the cornea of the donated eye? How and why should we organise groups to motivate the
community members to donate their eyes after death?
3. (a) How does a bar magnet differ from an electromagnet.
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(a) pupil (b) retina formed an image in the eye (c)
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ciliary muscles use to control how much light entering the eye
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