Catherine S. Vu-Gia, O.D. Ha-Phuong Tran, O.D. PEDIATRIC OPHTHALMOLOGY. ADULT STRABISMUS. Dr. Nancy Morrison has been practicing ophthalmology for over 20 years. She completed her fellowship training in pediatric ophthalmology at the Wilmer Eye Institute at Johns Hopkins Hospital. She is board certified by the American Board of Ophthalmology..