Semi-Rimless Safety Readers with Black Frame, Clear Lens and Anti-Scratch Coating - +2.50 Diopter. Magnification reader glasses are for the worker who needs to see up close. The 30 mm wide "curved top" reading magnifier provides the worker with enough lens area to view his work throughout the day. Durable nylon frame with extra wide latex-free rubber nose pads for more comfort when working up close. Temples with soft rubber pads provide a secure fit