pretty cool. I use these glasses when driving. I used to use regular shades, but these really cut down on the glare, whereas normal shades just make everything darker. http://www.nextten.com/store/opticsbinoculars/EagleEyesTechnology/EagleEyes.aspx
yeah, they make a sunglass for street racing (bikes, running) called speed tint... i sent em an email asking them to make that tint for the contacts, i could see a lot of trackers/ralliers liking them, especially the open-face helmet guys.