Do any of Miller's helmets conform to EN379 Optical Clarity Standards? If so, what is the four numbered rating? All other high-end helmets like Speedglass, Bolle', Optrel, and Lincoln are now currently conforming to this high standard to save welders eyes. Why haven't Miller helmets stated any conformity? A EN379 rating of 1/1/1/1 is perfect. Speedglass is 1/1/1/2. Lincoln is 1/1/1/1..... the only perfect one in the group. Bolle' is 1/1/1/3. Optrel is 1/1/1/2.