Sushil went to an eye specialist for check up. He prescribed him to use spectacle lens of + 0.5D power. a.…
Sushil went to an eye specialist for check up. He prescribed him to use spectacle lens of + 0.5D power.
a. Name the defect of vision he is suffering from.
b. Find the focal length of spectacle lens.
Solution
a. Hypermetropia.
b. Power of spectacle P = + 0.5D f = 1 =+ 1 m P 0.5 or f =+ 2 m positive sign means it is a convex lens.