Dewalt DPG59-110C Reinforcer Rx-Bifocal 1.0 Clear Lens High Performance Protective Safety Glasses with Rubber Temples and Protective Eyeglass Sleeve Magnification diopter is molded into the polycarbonate lens. Safety glass and Reading glass all-in-one Impact resistant and 99.9% UV protection Handgrip pattern on temple is ergonomically positioned for secure grip Distortion free lens provides fatigue free use