When glaucoma has already caused vision loss, further vision loss may occur even after the pressure in the eye is lowered to the normal range with medicine. Talk to your doctor about the goals of treatment, how long the medicine will be tried, and the possible side effects.
Game character. Yoda is a playable character in Lego Star Wars: The Video Game, Lego Star Wars II: The Original Trilogy, Lego Star Wars: The Complete Saga and LEGO Star Wars III: The Clone Wars. In all four he wields a green lightsaber and is a Jedi character, so can use The Force. In the latter he can also throw his lightsaber.
Excluding The Clone Wars (the movie and both animated series), here's the actors who were in both trilogies (but not always in all films): Anthony Daniels played C-3PO and Kenny Baker played R2-D2 in all six movies. Frank Oz, as you have already mentioned, played Yoda's voice in five movies. Ian McDiarmid played Senator/Chancellor/Emperor Palpatine (and Darth Sidious) in 4 movies (Episodes I-III and VI) originally, but was dubbed in for Episode V later. So you could say he was in four of the movies when they were originally released, but is currently in 5 of the movies.