1.

A person needs a lens of power, −5.5 D for correcting his distant vision. For correcting his near vision, he needs a lens of power, + 1.5 D. What is the focal length of the lens required for correcting:(a) distant vision?(b) near vision?​What type of lens is being used for correcting (i) distant vision, and (ii) near vision?

Answer» A person needs a lens of power, −5.5 D for correcting his distant vision. For correcting his near vision, he needs a lens of power, + 1.5 D. What is the focal length of the lens required for correcting:

(a) distant vision?

(b) near vision?

​What type of lens is being used for correcting (i) distant vision, and (ii) near vision?


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