The toilet I am currently sitting on has a very similar set up. The toilet came with the house, and I haven't been able to discern a difference in the 8 years I've lived here.
When my grandma died, all her spoons were placed in a basket at the entrance to the church. She had 8 kids, dozens of grandkids, and lived in a small town of 500. Everyone she knew that was alive came and took a spoon.
Comedian Kyle Ayers has Trigeminal Neuralgia as well. He's about to do the Edinburgh Fringe Festival with his show (Hard to say) all about how he's been dealing with it. I know that doesn't help you with your glasses, but maybe his comedy can help alleviate some of the pain and worry.
Flying squid