Although this is a minority view, sub-Tenon’s block works more often than most would think in eyes with an encircling scleral buckle. This will be discussed more in Depth at BOAS 2020 on the 7th of December durng the webinar meeting. To give you an idea, here’s an instructive Video I had the pleasure of recording with Assistant-Professor Dr. Andreas Ebneter and Dr. Andy Schaer.