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WORTH A LOOK: CONTACTS CAN HELP BLOCK THE SUN FROM EYES
Exposure to ultraviolet rays isn't just a problem for skin. It can also increase the risk of developing eye disorders, including macular degeneration and cataracts, which are two leading causes of vision loss in the United States.
Ref. deseretnews.com
I doubt that people who don't where contacts normally will want to get contacts that can block the sun but provide no visual assistance. I wear glasses but can't wear contacts right now. If that changes, I think I will check out these special contacts because it would be better than the clip on sunglasses I wear now. But I wouldn't have tried it other wise, my eyes are just to sensitive to put something in them or on them.