Current Ophthalmology Residents

Ethan Stern, MD, originally a San Diego native, spent time in New Orleans as a touring jazz pianist before he went back to school at Tulane University to obtain his medical doctorate and internship training. Ethan has taken a particular interest in many different areas of research, including his published works on herpes keratitis while working at the Louisiana State University Department of Ophthalmology as well as his published papers on retinal pathology with Drs. Gholam Peyman, Mandi Conway, and Anthony Mazzulla. Ethan loves exploring new restaurants, learning new things, and solving complex riddles.

Dr. Lopez was born and raised in El Salvador. She attended Dr. José Matías Delgado University where she obtained her Doctor of Medicine degree. Subsequently she obtained her Masters in Ophthalmology at the Universidad de San Carlos de Guatemala in Guatemala City, and was elected Chief Ophthalmology Resident.

Upon her arrival to the U.S., Dr. Lopez did a Postdoctoral Research Fellowship at Schepens Eye Research Institute/Massachusetts Eye and Ear Infirmary, Harvard Medical School and Tufts Medical Center/Tufts University School of Medicine in Boston MA, under the mentorship of Dr. Pedram Hamrah, studying the trafficking mechanism of immune cells to the cornea in the murine model of corneal transplantation, with the aim of developing novel therapeutic strategies for corneal graft rejection. Her work has resulted in published manuscripts in Nature Communications, Frontiers in Immunology, Investigative Ophthalmology & Visual Science, The Ocular Surface, among others.

Her commitment to the profession prompted her to apply to an ophthalmology residency in the U.S, to fulfill her childhood dream of becoming an ophthalmologist. Prior to her move to New York, she did her internship at Berkshire Medical Center in Pittsfield, MA. Maria enjoys spending quality family time with her husband, two children, and a dog. She also enjoys leisure reading and watching movies.

Shaina Kumar, MD, was born in India and raised in Brooklyn, NY. She graduated St. Joseph’s College summa cum laude with a BS in Biology, along with Departmental Honors and a membership in the Delta Epsilon Sigma honor society. Prior to attending medical school, her passion for humanitarian service abroad was confirmed during her mission trip to Zambia, where she worked with the Salvation Army on various community service projects there. She attended medical school at Drexel University College of Medicine where she was involved in organizations such as the South Asian Medical Student Association and Doctor's Note. While participating in research, shadowing, and rotational experiences in ophthalmology during medical school, her passion for the field grew. She hopes to combine her passions for ophthalmology and global health, especially in underserved areas, in the future. Shaina enjoys yoga and meditation, exploring new restaurants and places, and spending time with family and friends.

Dr. Shumway grew up in Phoenix, Arizona and attended college at Brigham Young University, followed by medical school the University of California, Irvine. During his medical training, he was a part of the PRIME-LC program, which focuses on medical education for serving the Latino community. He completed a post-doctoral fellowship in ocular pathology and research at the John A. Moran Eye Center at the University of Utah, and he has enjoyed humanitarian service trips to the Navajo Nation, Peru, Panama, Kenya, Thailand, and Mexico.

Transitional Resident

Dr. Yoon was born in Incheon, South Korea and moved to the U.S. in 2005. He attended the University of Texas at Austin where he studied biomedical engineering and biochemistry and graduated with highest honors. He attended Texas A & M University Health Science Center College of Medicine. He has enjoyed medical mission trips to Nicaragua, Peru, Zambia, and Haiti, and grew his genuine interest in ophthalmology. He served on the leadership team of the ophthalmology interest group. Dr. Yoon is excited to serve the population of the Bronx.

Dr. Ding grew up in northern China and obtained his Doctor of Medicine degree from Shandong First Medical University. He then went on to participate in a postgraduate clinical training program at Zhongshan Ophthalmic Center, followed by a Ph.D. in Ophthalmology from the Sun Yat-sen University in Guangzhou. During his Ph.D., he was awarded a two-year fellowship at the Wilmer Eye Institute of the Johns Hopkins University, under the mentorship of Dr. Peter Campochiaro. After completing his Ph.D., he returned to the U.S. and continued to work as a postdoctoral research fellow at the Wilmer Eye Institute. His research focused on ocular gene therapy and mechanisms involved in ocular neovascularization. He has published papers in several journals, including the Journal of Clinical Investigation, Science Advances, and Gene Therapy. In addition to Ophthalmology, Dr. Ding enjoys traveling, hiking, gardening, ping-pong, and spending time with family.

Dr. Guerrero-Criado was born in Caracas, Venezuela, and raised in Venezuela, Spain, Florida, and Texas. He graduated summa cum laude and with Honors in two Bachelor’s degree programs at Oklahoma State University, one B.S. in Microbiology, Cell, and Molecular Biology (with an emphasis in Molecular Genetics), and another in Biochemistry with a focus on Premedical Sciences, in addition to minoring in Spanish and Chemistry. At Oklahoma State, Dr. Guerrero-Criado was honored as a Top Ten Senior in both the College of Arts & Sciences and the College of Agricultural Sciences and Natural Resources, while also being recognized as the Frank Rector Outstanding Premedical Student. As an undergraduate student, he was selected for a collaborative program between the National Science Foundation, Oklahoma State University, Louisiana State University, and the Université Grenoble Alpes and Université Joseph Fourier. In this capacity, he applied his biochemical and microbiological expertise to study the localization and structure of plastidial-encoded polymerase subunits in Grenoble, France. Dr. Guerrero-Criado served as a research apprentice at Washington University in St. Louis School of Medicine, investigating the role of RNASET2 in oxidative stress which leads to cell apoptosis when fully expressed. He subsequently published his research in Nature. During his years as an undergraduate, Dr. Guerrero-Criado worked as a research assistant at Oklahoma State University in phylogenetics, discovering novel microorganisms, metagenomics, and proteomic approaches, transcriptomics, and various bioinformatics tools to study the pathogenicity of Elizabethkingia. Dr. Guerrero-Criado also worked as a Certified Pharmacy Technician, Residential Advisor, and Nutritional Consultant to pay his way through college.

Dr. Guerrero-Criado graduated from medical school at Texas Tech University Health Sciences Center School of Medicine in Lubbock, Texas, as the Best Ophthalmology Student in his class. During his years as a medical student, he acted as Chapter President & Executive Board National Conference Chair for the Latino Medical Student Association, where he and his team were able to bring the largest conference to date to West Texas. Dr. Guerrero-Criado’s passion project, while at TTUHSC SOM, was the Ophthalmology Free Clinic system that he and his team used to usher into the 21st Century by establishing a Cloud-Based EMR that increased retention by >100%. Dr. Guerrero-Criado also serves as a member of the Bowers Lab at Harvard Medical School’s Schepens Eye Research Institute, a position he has held since 2018. During his free time, Dr. Guerrero-Criado enjoys spending time with his wife and their German Shepherd Evey, exercising, collecting sneakers, and watching television and film. He is also actively involved with the Catholic community.