Parfocals

Parfocals are a type of multifocal lens designed to provide clear vision at multiple distances. Unlike bifocals or trifocals, which have distinct, visible lines separating different prescription zones, parfocals feature a gradual transition between the near, intermediate, and distance correction. This gradual change aims to offer a smoother visual experience and reduce the "jump" in vision that some users experience with traditional lined multifocals.

The technology behind parfocals typically involves intricate optical designs etched or molded into the lens surface. These designs create a series of concentric rings or zones, each with a slightly different refractive power. As the wearer shifts their gaze up and down, they naturally move through these zones, allowing for clear vision at varying distances without the need to tilt their head or find a specific spot on the lens.

Parfocals are often prescribed to individuals experiencing presbyopia, the age-related loss of close-up focusing ability. They are intended to help wearers see clearly for tasks such as reading, using a computer, and viewing objects in the distance. The design of parfocals is intended to mimic the natural focusing ability of a younger eye, providing a more seamless visual continuum. However, adaptation to parfocals can sometimes take a period of adjustment as the brain learns to interpret the different visual cues presented by the lens.