Multi focus Reading Glasses include 3 strengths within 1 pair of reading glasses, so you can read, view your computer monitor and converse with others, all without having to take off your reading glasses. Stylish Classic Aviator Progressive Reading Glasses - Spring Hinge for Comfortable Fit - Great for computer usage. Adult Size - 55mm Lens Width, 45mm Lens Height, 140mm Frame Width Select your normal reading magnification power (eg. +1.50 or +2.00), which will be visible through the lowest section of the lens. When looking through the lens, the strength level will decrease as yours eyes move upward. These invisible trifocal readers feature metal spring hinges that offer greater comfort when worn as well as more durability than other readers The outcome: ideal viewing experience for both working at the computer and looking across the room. Content include 1 trifocal no line reading glasses and 1 microfiber/cleaning storage pouch