Gary H. Cassel, MD, completed his ophthalmology residency in 1984 at Wills Eye Hospital and was certified by the American Board of Ophthalmology in 1985. Awarded a National Institutes of Health grant to study retinal neovascularization, he joined the laboratory of Bert M. Glaser, MD, at Johns Hopkins Medicine's Wilmer Eye Institute as a retinal research fellow. After practicing clinical ophthalmology part-time at Wilmer and in the community, Dr. Cassel gravitated to full-time ophthalmology private practice in Baltimore County, Maryland. He was recognized by Baltimore Magazine as a "Top Doc" among ophthalmologists and ophthalmic surgeons in 2011 and 2012.