A near sighted person wears eye glass with a power of 55 D

Last updated: 6/8/2023

A near sighted person wears eye glass with a power of 55 D for distance vision His doctor prescribe a correction of 1 5D in near vision section of his te which is measured relative to main parts of the lens What is the focal length of near vision section of the lens a 18 18 cm b 25 cm c 40 cm d 35 cm Oa OF Od