PUKCLAR TAC (Triacetate) lenses pass a double decentering test,avoiding the possibility of optical distortion that can cause eyestrain and headaches. ABOUT PUKCLAR. ► TAC Polarized Sunglasses:All the sunglasses lens use 100% UV400 protection coating,can block 100% harmful UVA & UVB Rays.100% filtering Up to 400nm Harmful Blue Light.