MEDICAL PHYSIOLOGY

Detailed explanation-1: -Nearsighted people wear glasses with concave lenses to correct their vision. A concave lens corrects myopia by being thinner at the center and thicker at the edge. It diverges light rays entering the eye so they focus a little further back, landing directly on the retina instead of in front of it.

Detailed explanation-2: -A concave lens is used to correct short-sightedness (myopia). A short sighted person’s focus is focusing before the back of the eyeball. The concave lens pushes the rays of light further apart so that they arrive together in proper focus at the back of the eye.

Detailed explanation-3: -Nearsightedness (myopia) is corrected with lenses called “minus power lenses.” They are concave-shaped and help the eyes focus light properly.

Detailed explanation-4: -4). In myopia light rays are focused in front of the retina, so that a minus concave lens is needed to diverge the rays (Fig.