How is myopia corrected?

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

To correct myopia, a minus lens (concave lens) is used. This type of lens diverges light rays entering the eye, effectively moving the focal point back onto the retina. Therefore, when a person with myopia wears glasses with minus lenses, it helps to clear their distance vision.

Other options, such as plus lenses, which are used for hyperopia (farsightedness), or prism glasses, primarily used to correct issues like double vision or eye alignment, do not address the focal point issue associated with myopia. Bifocal lenses, on the other hand, include both distance and near vision corrections but are not specifically designed for treating myopia alone. Thus, minus lenses are the appropriate choice for correcting myopia effectively.