Which type of lens is commonly used to correct presbyopia?

The commonly used type of lens to correct presbyopia is bifocal or progressive lenses. Presbyopia is a condition associated with aging where the eye's ability to focus on nearby objects decreases. Bifocal lenses have two distinct optical zones: one for distance vision and the other for near vision, allowing individuals to see clearly at both distances. Progressive lenses offer a more seamless transition between multiple focal points without visible lines, providing a gradual change in lens power for distance, intermediate, and near vision.

This design effectively addresses the visual needs of individuals with presbyopia, enabling them to read and work up close while also being able to see at a distance. Single vision lenses are designed for one specific distance and would not be suitable for those needing correction for both near and far vision simultaneously. Photochromic lenses are tinted lenses that adjust to light conditions but do not inherently address presbyopia, and polarized lenses reduce glare but do not correct for refractive errors like presbyopia.