How do sunglasses protect our eyes?
Lenses in sunglasses are tinted to filter out light of certain wavelengths, reducing the overall intensity of light hitting your eyes, while minimising glare – reflected ambient light that obscures your vision on a sunny day.
Grey, green, brown or red are the most effective at minimising colour distortion the most – important for seeing clearly, especially while driving.
Lenses are made from glass or plastic; both are materials that block parts of the UV light spectrum, while allowing visible light through. Therefore, just wearing normal glasses already offers some protection from potentially harmful UV rays.