Bifocal

Bifocal

Bifocal lenses come with two focal points, i.e. for near and far vision and bear a visible segment line,demarcating these two focal points. The bottom portion of lens is used for near vision while the top portion is used for far vision. These lenses are available in different shapes. Most common is the Flat-Top, wherein the near segment of lens is 28-millimeters wide and shaped like an inverted D.