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A person needs a lens of power -5.5 diop...

A person needs a lens of power -5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting
near vision?

Text Solution

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power of the lens used for correcting near vision=+1.5D
Focal length of the required lens, f=1/P
f=1/1.5=+0.667m
The focal length of the lens for correcting near vision is 0.667m
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