Bifocals & Progressive Lenses
What are Bifocals and Progressive lenses?
Bifocals and Progressive lenses are eyeglass lenses that contain two or more powers within the lenses. Lenses which offer two areas of power allow patients to see distances and near, and when there are three areas of power, as in the of progressives, the extra area of power provides vision at an intermediate distances. Presbyopia, defined as losing ability to focus at all three area described above occurs in Adults during the normal aging process. Doctors prescribe bifocals or progressives to assist Presbyopia in Adults.
Progressives, often called “no-line” bifocals, contain three areas of visual correction; there are no visual lines in the lenses. A typical progressive lens corrects near vision from 12 to18 inches, intermediate vision from 18 to 24 inches and allows distance to be corrected 10 feet and beyond. When you’re looking at someone wearing eyeglasses you will NOT be able to tell if they have progressive’s lenses since there are no visual lines in the lenses. Progressives are an excellent option for someone who needs the strength of three areas of visual correction but would prefer a seamless appearance on each lens.
Bifocals contain two areas of visual correction which allow patients to correct both nearsightedness and farsightedness. A typical bifocal lens corrects near vision from 12 to18 inches and allows distance to be corrected 10 feet and beyond. When you’re looking at someone wearing eyeglasses you’ll be able to tell if they have bifocal lenses since bifocals have a line in the lens that divides distance and near corrections.Questions, contact us: email@example.com or 408-809-0232