Which type of lens is most likely to be used for correcting myopia?

Myopia, commonly referred to as nearsightedness, is a visual condition in which distant objects appear blurry while closer objects can be seen clearly. The primary cause of myopia is typically an elongation of the eyeball or excessive curvature of the cornea, which causes the light rays to focus in front of the retina rather than directly on it.

The lens type most effective in correcting this condition is a concave lens. Concave lenses are thinner at the center and thicker at the edges. They diverge light rays that enter the eye, allowing the focal point to shift backward so that it falls directly on the retina. This adjustment helps clear up the blurry images of distant objects for individuals with myopia.

In contrast, convex lenses are used to correct hyperopia (farsightedness), cylindrical lenses address astigmatism by correcting the way light is refracted, and aspheric lenses are designed to reduce aberrations and may not necessarily provide the specific correction needed for myopia. Each of these other types of lenses serves different optical purposes and conditions, making the concave lens the most appropriate choice for myopia correction.