Oakley Standard Issue Has Developed An Array Of Contrast Enhanced Prizm Lenses Which Provide Both Elite And Recreational Marksmen With Enhanced Clarity And Contrast Of Targets. The Lenses Strategically Block Specified Wavelengths Along The Color Spectrum In Order To Maximize Contrast Between Selected Colors In A Shooting Environment. The End Result, Prizm Eyewear Reduces Eye Fatigue And Enhance Target Acquisition. Lens Features All Optional Lenses Are Made Of Plutonite, Oakley'S High Purity Optical-Grade Polycarbonate All Lenses Feature Oakley High Definition Optics (Hdo) With Polaric Ellipsoid Geometry All Lenses Feature An Advanced Anti-Fog Coating Uv Protection Of Plutonite Lens Material That Filters Out All Uva / Uvb & Harmful Blue Light Up To 400Nm Wavelength Meets Or Exceeds High Mass And High Velocity Impact Requirements Per Ansi Z87.1-2003/2010 Meets Or Exceeds Ballistic Fragmentation Impact Standards Per Mil Prf-31013, Clause 3.5.1.1 Secure Fit, Even In Wet Conditions Via Hydr Discounted at only: US$ 250