lens for your frame

Bifocal lenses are a type of multi-focal lens – one that has more than one point of focus.  

Therefore, for those who need glasses for both reading and distance, bifocals seems to offer an attractive alternative.

Unlike single-vision lenses, bifocals have two viewing regions, each with a different correcting power, marked by a visible separating line. The larger upper portion of these lenses are meant for distance vision, while a smaller segment below is meant for reading.