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Fill in the following blanks with suitable words : A person is short-sighted if his eyeball is too……………. Spectacles with a………… lens are needed. A person is long-sighted if his eyeball is too……………. Spectacles with a …………. lens are needed. These focus light rays exactly on to the……….. |
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Answer» A person is short-sighted if his eyeball is too long Spectacles with a concave lens are needed. A person is long-sighted if his eyeball is too short Spectacles with a convex lens are needed. These focus light rays exactly on to the retina |
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