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3. For a person who is near-sighted, they have an eyeball that is longer/shorter than normal. This means the rays form an ima

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For a person who is near sighted, they have an eyeball that is longer than normal.

This means the rays form an image in front of the retina. To correct this vision, they need a diverging lens in front of their eye.

4) For a person who is far sighted, they have an eye ball shorter than normal. This means the rays form an image behind the retina. To correct their vision, they need a converging lens in front of their eye.

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