I'm curious of how well transition lenses do during the winter? I'm thinking of getting a pair of prescription transition cycling glasses since I bike at day and night, but like to know how well they do.
I'm using Rudy Project "Exception" glasses for riding and driving. This system has Rx inserts and snap-on/off outer lenses (they also flip up). I use the transition outer lens when its mostly cloudy and at night. They transition to about 50%-60%. I snap in the 90% lenses when the sun is very bright. I also use the amber outer lens for cloudy days. The frame is very comfortable, adjustable and rugged. Some of the outer lenses are impact proof.
I found that the transition took a lot longer when the lens was cold; and the colder the temperature, the longer the transition. It wasn't that big of a deal going from clear to tinted, but it really sucked when the sun would go down and I was stuck with dark lenses. As I recall it was really bad when the temp was below 15F, taking upwards of 20 minutes to de-tint.
My Transitions (progressive) lenses get dark as heck during sunny winter days. I don't think cold is a problem.
Mine too, especially if there is snow on the ground. I haven't noticed them changing any slower in the cold either. The only time I've not liked them is deer hunting with snow. As the sun starts to go down, the snow still reflects enough light to keep them darker than ideal for the last 20-30 minutes of sitting in the stand.