Donâ€t you wish you could wear single glasses for reading, your monitor, and across your desk? Why take your reading glasses on and off? Look no further! Here is the perfect solution for you. These reading glasses feature gradient progressive reading lenses with 3 focal strength. Bottom of the lens is full power reading power, and the middle of the lens is 75%, and the top of the lens is 50% strength. For example, if you choose +2.00 strength, the bottom of the lens will be +2.00, middle +1.50, top +1.00. Made with premium polycarbonate lenses, and spring hinges for maximum comfort. (pre11167cl)