Education While some may say the eyes are a window to the soul, for quite a while, doctors have known that the eyes can also offer a view into a person’s overall health. “The retina is one of the few places in the body where blood vessels can be directly observed non-invasively. Changes in the retinal blood vessels can indicate systemic vascular conditions such as hypertension , diabetes , and atherosclerosis ,” Mingguang He, MD, PhD , Chair Professor of Experimental Ophthalmology in the School