Noopur needs a lens of power-4.5 D for correction of her vision.
What kind of defect in vision is she suffering from?

Nooper needs a lens of power - 4.5 D for correction of her vision. (a) What kind of defect in vision is she suffering from ? (b) What is the focal length and nature of corrective lens ? (c) Draw ray diagrams showing the defected eye and correction for the defect. (d) What are the causes of this defect ?

Noopur needs a lens of power-4.5 D for correction of her vision. What are the causes of this defect?

Noopur needs a lens of power-4.5 D for correction of her vision. Draw ray diagrams showing the (a) defected eye and (b) correction for this defect.

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 ?