Dr. Drouilhet, physician of Retina Associates of Hawai'i, is a specialist in the field of opthalmology called vitreoretinal surgery. Ophthalmologists are physicians who have completed medical school, internship, and a residency in ophthalmology. Vitreoretinal surgeons study for one or more additional years to gain knowledge and expertise in the treatment of diseases and surgery of the retina and vitreous.