Reader offered in increments of +0.25 diopters…matching the exact reading power of your personal glasses. Magnification reader glasses are for the worker who needs to see up close The 28 mm wide reading magnifier provides the worker with enough lens area to view his work throughout the day Due to its lightweight, rimless design and thin, rubberized temples, the Z12R is one of the best fitting readers on the market today Gray rubber co-molded temples provide a secure fit Molded nose bridge design to fit the vast majority of users 9.25 Base curve lens +1.50 Diopter Meets ANSI Z87.1+