Dr. Drinnan has a special interest in cataract and refractive surgery and is one of the busiest cataract surgeons on the Peninsula.  He was one of the first surgeons to implant the new multifocal intraocular lens at Mills-Peninsula Hospital. He specializes in state of the art small incision cataract surgery  and other refractive surgeries to correct nearsightedness, farsightedness, and astigmatism.