Sandra M. Johnson, MD is Clinical Professor of Ophthalmology and the Glaucoma Fellowship Director at the University of Missouri School of Medicine in Columbia, MO. She was formerly an Associate Professor and the Residency Program Director at the University of Virginia School of Medicine in the Department of Ophthalmology. She completed her fellowship in clinical glaucoma at the Massachusetts Eye and Ear Infirmary and has decades of experience in the management of cataracts and glaucoma.