How can myopia be corrected?

Myopia, or nearsightedness, is a common refractive error where distant objects appear blurry because the eye focuses images in front of the retina instead of directly on it. To correct this condition, it is essential to use lenses that diverge light rays before they enter the eye.

Concave lenses, which are thinner in the center than at the edges, are specifically designed to diverge light rays. When a person with myopia wears concave lenses, the lenses help to extend the focal length, allowing the focused image to reach the retina instead of falling short. This adjustment enables individuals with myopia to see distant objects more clearly.

While convex lenses are used to correct hyperopia (farsightedness) and cylindrical lenses are used to correct astigmatism, they do not address the focal length issues inherent in myopia. Laser eye surgery is another option for correcting myopia by reshaping the cornea, but the most immediate corrective solution involving lenses is indeed through the use of concave lenses.