Training Glasses

I've just had old age set upon me roughly and have acquired bifocal glasses. I started with the progressive type lenses, and now have the old fashioned lined type. It's been a chore switching because I've gone through 3 sets of lenses and may have to try a 4th.

The problem seems to be getting a highly customized measurement and prescription template jammed onto a fairly generic lens/frame combination. The reading part is too high, the distance part not wide enough, etc. Everything seems fine at first, in the office, but after three days of real life they're not quite right and back I go.

I'm proposing a set of stick-on, for want of a better term, insets that can be temporarily affixed to your current Rx and worn for a few days before making positional changes, Rx changes or whatever else. This would save time with lenses going back and forth to the lab and having to be re-made. Once the best combination is found, the template is then sent to the lab for reproduction in the final product.

Optionally, this system could be used full-time to save on changing lenses if the Rx isn't expected to vary much from exam to exam.