Thin lenses — Describe

How are converging and diverging lenses used to correct long-sightedness and short-sightedness?

Long-sightedness (hyperopia), where the eye focuses light from near objects behind the retina, is corrected using a converging (convex) lens, which adds extra convergence so the image focuses on the retina. Short-sightedness (myopia), where the eye focuses light from distant objects in front of the retina, is corrected using a diverging (concave) lens, which spreads out the rays before they enter the eye so the image focuses further back on the retina.