Sunglasses should have100 percent protection from both UV and UV rays. Although UV is known to be more harmful to skin and eyes, doctors suggest to avoid both types of rays. The lenses should also block UV wavelengths up to 400 nanometers.
Theyprotect your eyes from the harmful ultraviolet rays of the sun. These glasses also keep the dirt and pollutants away from your eyes' sensitive areas and give overall protection to the under-eye area as well.