What type of lens is typically used to correct myopia?

Concave lenses are specifically designed to correct myopia, also known as nearsightedness. In myopia, distant objects appear blurry because the light entering the eye focuses in front of the retina instead of directly on it. Concave lenses are thinner at the center and thicker at the edges, which helps to diverge the light rays that are entering the eye. This divergence allows the light to focus further back, onto the retina, thereby sharpening the vision of distant objects.

Convex lenses, on the other hand, are used to correct hyperopia (farsightedness). Bifocal lenses contain two different optical powers and are usually used for individuals who need correction for both near and far vision. Cylindrical lenses are utilized to correct astigmatism, a condition caused by an irregular curvature of the cornea or lens that leads to distorted or blurry vision.

Therefore, the choice of concave lenses is the appropriate option for correcting myopia.