sun glasses
Hi Shumway76,
To my knowledge the advice has always been to avoid photochromic glasses because, while they darken quickly in bright sunlight, if the sunlight fades they lighten very much more slowly. However lenses are always developing so perhaps this advice might not still be current.
What I was using when I packed up flying in 2008 was lenses with a graduated tint. The lenses were darkest at the top and completely clear at the bottom.
When placing my order, I sat in my optician's shop and pointed out the angles of sight for the optician so he could make my spectacles so as to be clear from the cockpit coming downward (so that I could always see my instruments) and tinted above (where I looked through the windscreen). This worked very well.
BP.