Bump time...
Been a while since this thread was busy so a brief recap of the previous 4 pages:
Most people's recommendations were the Serengeti Velocity glasses... photochromatic lenses... people seemed very happy with these...
Also people recommending to avoid using polarised sunnies...
SO............. I was googling around and came across this pprune thread:
http://www.pprune.org/medical-health...unglasses.html regarding photochromatic lenses in the medical-health forum and noticed pretty much every post on there was against the use of photochromatic lenses (which most if not all serengeti sunnies are? at least I think the popular velocity type are...)... I think there are a few references to some theory books in the UK and some CAA advisories that recommend not to wear them while flying (just search "photochromatic" to make skimming through the threads easier).
Just thought it was interesting as none of the aussies / kiwis in this thread seemed to mention any bad things regarding photochromatic lenses while the thread posted above had a tonne of it...?