How to choose adequate UV protection for your eyes?

Dear Dr. Mo: How to be sure my sunglasses protect my eyes well from UV light? Is the price tag sufficient as guidance?

Dear reader: Your question is well timed and important and wherever we go, even when the skies are overcast with clouds, our skin and eyes are constantly exposed to UV light – invisible to us, but potentially damaging nonetheless.
Choosing the right protection becomes an integrative part of a healthy lifestyle.

Glasses UVThe two forms of UV (Ultra Violet) light that affect our health are UVA and UVB. There’s also UVC, which can be extremely damaging but our atmosphere’s ozone layer filters it out completely so it does not figure in our review here.

UVA is responsible for skin tanning and aging and UVB is linked to sunburn and skin cancer; a large portion of UVB is also absorbed by the ozone layer.

UV light also affects eye health and darker lenses may not necessarily provide better protection from it. In fact, a dark lens with poor or no UV protection can do just the opposite – it can damage the eye by allowing more UV rays into it. Continue reading