Hi, I'm a UCSF resident and I think it's a fantastic training program. In answer to your question, research has always been a priority here, but you certainly don't need a PhD to fit in. Of our current residents, 3 of 15 have PhDs.
Our program is very strong in clinical and surgical training (which is the more important than research in my opinion). One of the great things about the UCSF program is having both the SFVA and the SF General hospital as training sites. This means great surgical volume and the chance the see amazing pathology at the SFGH. Our faculty is excellent and quite approachable and the program strikes a nice balance between supervision and independence between UCSF clinics, the VA, and the General.
Surgical training is great. We have excellent volume, good variety, and get early exposure to OR cases and a variety of lasers. We have what is probably the best microsurgical lab in the country (5 OR-grade scopes, a phaco machine, and a view!) and have excellent surgical training sessions throughout residency (ie. ECCE, phaco, plastics, retina). We also have a weekly M&M where all surgical cases and any issues are discussed, which is a great learning tool (and one I think few programs have). As primary surgeon, first year residents do ECCEs, plastics cases, and anterior segment lasers; second years do phacos, muscle cases, and retina lasers (and assist with retina cases); third years do phacos, glaucoma surgeries, and plastics cases.
Overall, I think residents are happy and the training is outstanding. We're a work hard/play hard type of program, but you'll have fun and end up feeling very well prepared for either fellowship or a comprehensive ophtho job. I feel lucky to be a resident here and would definitely choose UCSF again!