Question: A child while playing with his fathers spectacles burnt a hole in a piece of the tissue paper by focusing the image of the sun

A child while playing with his father’s spectacles burnt a hole in a piece of the tissue paper by focusing the image of the sun on at.
a) Name the defect of vision his father is suffering form.
b) List two causes of the defect.
c) Draw a ray diagram to show how this defect may be corrected using a suitable lens.

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