To protect your eyes from harmful UV rays, your sunglasses need to block them, 100 per cent.
When
choosing your sunglasses, Site for Sore Eyes – Berkeley, CA recommends that you choose frames with a close-fitting style for providing the best protection.
Did you know there are three categories of UV rays?:
UVC
rays: These are the strongest UV rays which
have the potential to be the most harmful to your eyes and skin.
However, the good news is that the atmosphere's ozone layer blocks almost all
of these UVC rays.
UVB
rays: These have slightly longer wavelengths and are less
strong than UVC rays. Some reach the Earth.
UVA
rays: These are the visible rays which
have much lower strength than UVB and UVC rays. The important thing to note about UVA rays is that they pass through the
cornea and reach the retina, inside your eye.
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