Why IceSor Doesn't Claim "100% Block"? In the world of optics, "100% Block" is a marketing myth. A lens that blocks 100% of light would be pitch black. At IceSor, we value Scientific Honesty. Our IceSor Lens v1.0 focuses on Precision Leakage Management. Through our Dual-Shield process, we've pushed the total blue light leakage down to a verified 0.36%. While standard competitors (at 1.15% leakage) allow 3 times more harmful light to reach your retinas, IceSor creates the ultimate barrier for your circadian rhythm.