The lenses in these frames are actually LCDs that rely on an embedded camera to locate sources of glare like the sun. Even if there are multiple sources – say, the sun and the reflection of the sun off water or snow – the LCD lenses place a dark spot over the glare. You move, the glare moves, the dark spots move with it. The rest of the lenses stay relatively lightly tinted so you can see what you’re doing.
The company called Dynamic Eye is led by The company is led by Chris Mullin, who received his PhD in physics from the University of California at Berkeley. They do have a prototype, but production is yet to begin. However, different levels of pledges will reward you appropriately.