Quote:
Originally Posted by Grumpy old man
Transitions glasses became available in the early 90's I had a friend that worked there Pinellas park Fl . They were and still are expensive . Mrs Grumpy has a pair and they are pretty cool but it takes a bit of time for them to " transition " from light to dark. She even gave me one of their company T- shirts that were white inside but when exposed to the sun their logo would appear on the shirt . 
Most auto insurance companies won't insure a car/ truck with any type of aftermarket tint on the windshield . 
People also ask
How quickly do Transitions lenses change?
Photochromic lenses, when exposed to sunlight/UV rays, will on average take approx 30 seconds to a minute to darken and will continue to darken for a further 10 minutes to full sunglasses tint/shade, returning to an almost clear state within 2 minutes and fully cleared within 5 minutes .
https://www.transitions.com/en-us/our-company/history/ |
My Brother and I had self darkning glasses in the 70's early 80's.
Our family was not rich. So this wasn't something that was crazy $$$