Enimay Women's Retro Fashion Vintage Designer Aviator Sunglasses Large Lens UV 400 Plastic frame Plastic lens Non-Polarized Lens width: 6 centimeters Comes with FREE Micro Fiber Bag Lenses meet ANSI Z80.3 blocking requirements. The tint of the lens has nothing to do with the UV protection of the glasses. A clear lens with no tint and 100% UV protection is better for your eyes than dark, heavily tinted sunglasses without UV protection. UV 400 protection. (These block light rays with wavelengths up to 400 nanometers, which means that your eyes are shielded from even the tiniest UV rays.) You do not have to pay a premium for proper UV protection. While more expensive sunglasses may offer more stylish frames, higher quality lenses, sharper images and less glare, it is very easy to find inexpensive glasses that offer 100% UV protection.