Well, you left out a couple. Would Berkeley be UCB or Cal? I like Cal but I suppose it isn't really an acronym.
University of Houston College of Optometry's acronym, UHCO, is kind of onomotpoeic and sounds(looks?) like a sneeze.
The College of Optometry at Pacific University also has PU. I think I'm torn between sneezy UHCO and smelly PU for best acronym.
I do want to warn potential optometry students that any such ranking system such as this is generally not a good guide for selecting schools to apply to. Each person should focus beyond the superficial attributes of each school and decide for him/herself whether or not the school the school fits them. Since I already have blue-and-gold University of California (Irvine) apparel, and will probably get a nifty UC-blue-&-gold diploma frame, I think UCB would be a perfect fit for me; I can have color matched diplomas in my office one day! Perhaps you're a passionate person or just have a red-dyed hair; UHCO may be the choice for you. If you don't have allergy problems, then PU.