Contact Lenses that Work Like Sunglasses?

Nike is testing colored contacts that work like sunglasses on select professional athletes around the globe. Tennis and baseball players are getting red ones that purport to help athletes track fast movement better, while golfers are receiving gray ones that supposedly help a golfer discern the lie of a ball better. The players quoted in the article seem to think the lenses work very well. Is it the wave of the future in sports?

Great bonus unintentional comedy in this This Is London article, which mentions "Brian Roberts, of US basketball team Baltimore Orioles." BASEball, lads. Baseball.