A person wears eye glasses with power of 5 5 D for distance

Last updated: 6/25/2023

A person wears eye glasses with power of 5 5 D for distance viewing His doctor prescribes a remedy of 1 5 D for his near vision What should be the focal length of extra lens which should be pasted over lower section of his eyeglasses for correct near vision 12 5 cm 14 3 cm 16 7 cm 19 3 cm