bifocal lenses

Bifocal lenses are eyeglasses designed to correct two types of vision in a single pair of glasses. They have two distinct optical zones: the upper part helps see distant objects clearly, while the lower part assists with close-up tasks like reading. The transition between these zones is usually marked by a visible line. Bifocals are commonly used by people experiencing presbyopia, a natural age-related condition that reduces the eye's ability to focus on nearby objects. They provide a convenient solution by combining two prescriptions into one lens, eliminating the need to switch glasses for different activities.