School of Medicine
Showing 321-330 of 361 Results
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Karen Wai, MD
Clinical Assistant Professor, Ophthalmology
BioDr. Wai is a board-certified ophthalmologist and fellowship-trained vitreoretinal surgeon with Stanford Health Care Byers Eye Institute. She is also a clinical assistant professor of ophthalmology in the Department of Ophthalmology at Stanford University School of Medicine.
Dr. Wai is a retina specialist who diagnoses and treats retinal and macular diseases, including age-related macular degeneration, diabetic retinopathy, retinal vascular occlusions (blockages), and retinal tears/detachments. The retina is a tissue layer in the back of the eye. It converts light into signals that the brain then interprets as images. The macula is the part of the retina responsible for central (straight ahead) vision. Diseases of the retina and macula can cause low vision and vision loss.
Dr. Wai’s research interests include working with data from electronic health record databases to improve patient outcomes. She has researched morbidity and mortality (illness and death) rates in patients with retinal vein occlusions and retinal artery occlusions. A retinal vein occlusion is a blocked vein to the retina that can cause vision loss. A retinal artery occlusion is when an artery to the retina is blocked, which is also sometimes referred to as eye stroke. Dr. Wai has also examined the effects of systemic medications on the retina. She has won several ophthalmology awards, including the Heed Fellowship and Harvard Medical School’s Excellence in Clinical Instruction Resident Award.
Dr. Wai has published in more than 40 peer-reviewed journals, including Ophthalmology, American Journal of Ophthalmology, and JAMA Ophthalmology. She has presented research at meetings and conferences around the United States.
Dr. Wai is a member of the American Board of Ophthalmology. -
Grzegorz Walkiewicz
Postdoctoral Scholar, Ophthalmology
BioGrzegorz (Greg) Walkiewicz, PhD, is a neuroscientist with a strong background in retinal and neurodegenerative disease research. He completed his PhD at KU Leuven (Belgium), focusing on tau pathology and Alzheimer’s disease. His research explores the connection between brain and eye pathology, with particular interest in pTau, Aβ, and microglial activation. He has worked extensively with transgenic mouse models as well as human brain and retinal tissues. He recently joined Stanford University to investigate INPP5K-related mechanisms in retinal ganglion cell degeneration.
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Brian A. Wandell
Isaac and Madeline Stein Family Professor and Professor, by courtesy, of Electrical Engineering, of Ophthalmology and of Education
Current Research and Scholarly InterestsModels and measures of the human visual system. The brain pathways essential for reading development. Diffusion tensor imaging, functional magnetic resonance imaging and computational modeling of visual perception and brain processes. Image systems simulations of optics and sensors and image processing. Data and computation management for reproducible research.
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Runfeng Wang
Undergraduate, Ophthalmology
BioRunfeng Wang is an undergraduate student in Biomedical Engineering at Shanghai Jiao Tong University. In the summer of 2026, he is a Visiting Research Intern at Stanford University under the guidance of Professor Kevin Chan. His research focuses on neuro-fluid dynamics and cerebrospinal fluid-blood-oxygen-level-dependent (CSF-BOLD) signal coupling. His broader research interests encompass functional magnetic resonance imaging (fMRI) data analysis and invasive brain-computer interfaces (BCIs).
