ANSI Z87 Hydras Safety Reading Glasses Bifocals I/O +2.5. Bifocal magnifying diopter of 1/2" tall in lower portion of lenses for reading. Black frame with grey trim, indoor-outdoor lenses. Shatter resistant, polycarbonate lenses that shield 99.9% of UVA and UVB light. Zero distortion lenses. Precision engineered to provide superior visual clarity. Soft nosepiece and extra long soft PVC inserts on temple tips for extended wearing comfort. Light and comfortable fit. Sporty and stylish. Vented nose bridge. 5.25" width from temple hinge to temple hinge. Hard coated, scratch resistant lenses. Meets ANSI Z87+ safety standards.