With bifocals, Varilux, things are good. One problem I had was with "transitions" lenses. Out on a day that turned them into sunglasses, so to speak, when darkened it's impossible to see small dark numbers in lenses. Also in bright light but in a car on a nice day they don't turn dark enough. So clipon's are added.

Last eye exam my ophthalmologist took off the transitions so it's on and off with clipon's. He did say transitions would interfere with my photography. It does add a degree of interference. Noted.

Now for a Sub Category: Those who need hearing aids.
All the shop work and other loud environments have worked me over. Now for the three grand.