What photochromic process do you use?
I ask, because the prescription pair I bought from you a year or more ago, though they "work," do not get dark enough for me to use them as sunglasses in the bright sun. I think Transitions VI is now "state of the art," and wondered if that's what you use, or some other vendor or process. I'd gladly order a darker pair, if you have them to sell.
Recommend eye doctor & optical: