Biology, asked by gurleen5954, 1 year ago

Difference between positive and negative eye power

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Answered by Anonymous

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A plus sign in front of the number means you are farsighted and a minussign means you are nearsighted. These numbers represent diopters, the unit used to measure the correction, or focusing power, of the lens your eyerequires. ... The C refers to the "cylinder" or astigmatism, and can be anegative or a positivenumber.

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