Here’s the deal with a frame this innovative. Normally, when a single lens shield goes across both your eyes, you end up with optical distortion at the sides. Not so with PROBATION because it utilizes POLARIC ELLIPSOID geometry, an innovation of HIGH DEFINITION OPTICS® (HDO®) that maintains clarity all the way to the peripheral edges. PROBATION meets all ANSI Z80.3 standards for optical performance and precision, as well as Z80.3 basic impact standards. As far as UV protection goes, Oakley's proprietary lens material filters out 100% of all UV, not just UVA or UVB.