[pct-l] Rx Sunglasses for snow/glaciers?

[Deems]

Here's a request for info from the crowd. I need a new pair of Rx sunglasses 
that will work for me on snow and glaciers, mtn climbing , high elevation, 
and hiking. Primary focus is on snow, and the brand/model has to be 
prescription compatible. Tell me what you know that works, and doesn't work. 
Rx solutions desired, but I will listen to clamp on possibilities.  Looking 
cool on the trail would be a plus.