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If one surface of a lens is +6.75 and the lens has a power of +7.00,...

If one surface of a lens is +6.75 and the lens has a power of +7.00, what is the power of the other surface?

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Answer #1

Resultant power P = P1 + P2​​​​​​

7 = 6.75 + P2

  P2 = +0.25

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