Developed by NASA scientists. Why do police, Marines & Olympic champions choose Eagle Eyes sunglasses? Eagle Eyes view Regular view Because Eagle Eyes give them the edge in safety and performance. Eagle Eyes feature patented triple lens sight saver technology developed by NASA scientists! They are the most protective; brightest sunglasses in the world utilizing technology based on how eagles find their prey from great distances. They block 99% of all dangerous blue, violet, and ultraviolet light, giving you the very best protection against problems that can be caused by sun and glare: headaches, eye fatigue, snow blindness, and more serious degenerative conditions. Clip-ons/Classics Ordinary sunglasses darken and reduce visibly. Eagle Eyes make everything appear clearer and brighter even in haze, rain and snow. Yet your eyes are comfortable. According to Kelly White, Fire Department Battalion Chief, Eagle Eyes improve visual clarity, they are lightweight, comfortable to wear and they look great. Lenses made in the USA.