Got to 3100GB for newly purchased the TV and when I already have a pair of glasses, I thought they did not put so good so went and bought me these 3700cr. Then you can remove the plastic piece that sits around the nose, they become completely flat in the front so they are perfect on top of the existing glasses. The only negative thing is that they could have been a little bigger, not because they do not cover the entire field of view but a little störra had not been wrong.
After a while one forgets easily forget that you have them on when they are very light. Then it is enough to sync issues with the TV set once, they turn on and off automatically!