Which condition is often addressed with bifocal lenses?

Bifocal lenses are specifically designed to assist individuals who have presbyopia, a condition that typically arises as a natural part of aging. As people age, the lens of the eye loses its ability to accommodate or focus on close objects. Bifocal lenses provide two different optical powers: one for distance vision and another for near vision, enabling individuals with presbyopia to see clearly at both distances without needing to switch between different pairs of glasses.

The other conditions listed—myopia, hyperopia, and astigmatism—are typically managed with single-vision lenses or other specialized lens designs, but they do not require the dual vision capabilities that bifocal lenses provide. Myopia, or nearsightedness, involves difficulty seeing far away; hyperopia, or farsightedness, can create trouble seeing nearby objects; and astigmatism results from an irregular shape of the cornea or lens, causing blurred vision at various distances. Each of these conditions has its own corrective lens style that is more suited to treat their specific visual needs.