Progressive Lens

Progressive lenses have zones meant for close-up, intermediate, and distance vision. These zones blend into one another, so the change in power is—you guessed it—progressive, rather than abrupt. Typically, the top portion of the lens helps with distance viewing, and comes into play as you look straight ahead. The middle portion is meant for intermediate viewing, such as when you consult your computer screen by looking slightly below your eye level. Finally, the near vision zone tends to be at the bottom of the lens, and makes tasks like reading and sewing a breeze.