What type of lenses are commonly prescribed for myopia?

Myopia, also known as nearsightedness, is a common vision condition where distant objects appear blurry while close objects can be seen clearly. This occurs when the eyeball is longer than normal or the cornea has too much curvature, causing light rays to focus in front of the retina instead of directly on it.

Concave lenses are specifically designed to correct myopia by diverging light rays before they enter the eye. This adjustment helps to move the focal point back onto the retina, allowing for clearer vision of distant objects. The negative curvature of concave lenses helps to counteract the excessive focusing that characterizes myopia.

In contrast, convex lenses are used for hyperopia (farsightedness) and would further exacerbate myopic conditions. Bifocal and multifocal lenses are designed for individuals with presbyopia or those who need assistance at multiple distances, but they do not specifically address the needs of a myopic patient. Thus, the use of concave lenses is the most appropriate and effective treatment for correcting myopia.