Our UHN programs and services are among the most advanced in the world. We have grouped our physicians, staff, services and resources into 10 medical programs to meet the needs of our patients and help us make the most of our resources.
University Health Network is a health care and medical research organization in Toronto, Ontario, Canada. The scope of research and complexity of cases at UHN has made us a national and international source for discovery, education and patient care.
Our 10 medical programs are spread across eight hospital sites – Princess Margaret, Toronto General, Toronto Rehab’s five sites, Toronto Western – as well as our education programs through the Michener Institute of Education at UHN. Learn more about the services, programs and amenities offered at each location.
Maps & Directions
Find out how to get to and around our nine locations — floor plans, parking, public transit, accessibility services, and shuttle information.
Ways You Can Help
Being touched by illness affects us in different ways. Many people want to give back to the community and help others. At UHN, we welcome your contribution and offer different ways you can help so you can find one that suits you.
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The test takes about a minute, two minutes, tops.
Perched on a stool, face supported on a chinrest, the patient looks into the optical coherence tomography (OCT) machine. A white cross on a black background is in her field of vision, with red lines that move up and down, back and forth.
Dr. Efrem Mandelcorn, clinician investigator at the Krembil Research Institute and a retinal surgeon at the Donald K. Johnson Eye Institute's Retina Clinic, directs a laser into the patient's eye. He's using light waves to take cross-sectional pictures of the patient's retina and optic nerve. It's painless, it's simple and it's over very quickly.
OCT has been used in optometrist's and ophthalmologist's offices to diagnose eye diseases like glaucoma for years. But researchers like Dr. Mandelcorn are hoping this simple test could be used someday to help doctors diagnose neurodegenerative disorders such as Alzheimer's disease, Parkinson's disease and amyotrophic lateral sclerosis (ALS), even before patients show symptoms.
"We have very good technology to look at the eye," explains Dr. Mandelcorn. "You can look at what's called the retinal nerve fibre layer, which goes right to the optic nerve.
"It is a direct connection from the eye to the brain – a window to the brain."
The Krembil Research Institute and the Globe and Mail have teamed up for a special content project designed to highlight the tremendous accomplishments of our scientists and research programs at Krembil. The first of three magazines in this series looked at the brain and spine program and was released in the spring. A second magazine highlighting the vision program is now available online and a the third in the series will explore the arthritis program later this year.