Progressive lenses look exactly like single vision lenses. Progressive lenses enable you to see clearly at multiple distances without an annoying bifocal lines. Sharp vision for distance vision at the top of your lens and as you look down the intermediate zones sharpens your vision for intermediate tasks and then your reading zone comes into focus. This is all happens gradually allowing for sharp vision for all three zones. An excellent choice for most people 40 years and older who are having difficulty seeing at multiple distance with only one pair of eyeglasses.