Let’s talk about the difference between nearsightedness and farsightedness. Nearsighted also called myopia is when people can see nearby objects clearly, however objects that are far away appear blurry and not in focus.

Near sighted may be caused by an eyeball that is too long or a cornea that curved steeply. As a result, as light passes through the lens, the image comes into focus at a point in front of the retina. This results in a blurry image.

To correct nearsightedness, a person can wear glasses with concave lenses. A concave lens also called a diverging lens is a lens that is thicker at the edges than in the center, as the nature of the problem of near-sighted is that the light is focused in front of the retina. A diverging lens, which a concave lens is, will serve to, diverge the light before it reaches the eyes. The light will then be converged by the lens which is convex to produce an image on the retina far sightedness also called hyperopia is when people can see distant objects but objects up close are blurry.

This may be caused by people with eyes that are too short or a flat cornea. The lens of the eyes bends the light from nearby objects so that the image does not focus properly on the retina, but instead is focused beyond the retina.

If light could pass through the retina, the images would come into focus at a point behind the red. convex lenses are used to correct farsightedness. Convex lens is thicker in the middle than the edges.

A convex lens makes the light rays bend towards one another. Before they reach the eye then the lens of the eyes bends the rays even more which causes a light to strike the retina and the image will be in focus.