Earlier this season the foam on my 12 year old Oakley A frames disintegrated. After reading some reviews of different makers (Bolle, Zeal and I think Smith) I wanted to try photochromatic lenses, and found a good deal on Amazon for these ($50). They have been awesome - no fogging and the lenses which vary the amount of tint depending on the light conditions are phenomenal. I use them from anything from night skiing to bluebird days. In low light the shadows don't pop out quite as much as when using yellow goggles but still visibility is great. If I were to do it again I would consider the snow tiger or zebra light lens which don't go quite as dark. Nevertheless I am very very happy with these. I have used them around 8 days/nights of skiing so far.
Hope this helps someone.