Ah cool! Thank you. In my native language the word for varifocals would directly translate to transition lenses.

I think my mom had some transition lenses back in the early nineties. The problem was that they were slow to go back to clear when you left the sun. So basically you got the equivalent of your glasses fogging up when you went inside, but in summer also. They might be better now.

It's probably more of a young thing because old people already tried them and gave up.