You have to understand that sunglasses help in two vital ways:
* decrease visible light (bright and blue light) and reduces glare to a comfortable level
* protect your eyes from the invisible and harmful UV rays
Ensure that the lens are dark enough to keep your eyes comfortable but not too dark such that they reduce your vision. Be aware that if you spend a lot of time at the beach or skiing, you should wear sunglasses with a darker tint to block more light as UV rays bounce off snow or water surface.




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