JT lenses pass the American ASTM standard and the European EC Standard. but testing doesn't stop there. JT shoots them. stomps them. hits them with 1/4 inch steel balls at 400 fps. runs over them. and lets the dog chew them. And that proves one thing - JT lenses meet an even higher standard - the JT Standard. With a fog-resistant coated thermal inner lens that can be cleaned with a JT micro fiber cloth. the standard has been lifted even higher to include pure optical style.