What type of lens is designed to provide correction for distance, near, and intermediate vision all in one?

The lens designed to provide correction for distance, near, and intermediate vision all in one is a progressive lens. Progressive lenses feature a gradient of increasing lens power, allowing for a smooth transition between different focal zones without the visible lines found in bifocal or trifocal lenses.

In contrast, a bifocal lens contains two distinct areas for distance and near vision, which does not accommodate the intermediate range. A single vision lens is intended for only one distance (either near or far), thus resulting in limited functionality for varied vision needs. Although a double-D segment trifocal lens does offer three distinct areas for vision correction—near, intermediate, and distance—it is not seamless, as it features visible lines separating these areas. The progressive lens effectively combines all three focal points into a single lens without these lines, providing a more natural visual experience.