Get to know the Big 5

Five eye conditions are responsible for most vision loss in Canada.
Check out our quick-hit videos on each of the Big 5 serious eye health concerns and explore their causes, risk factors, and how they’re diagnosed and treated.

Check your ‘eye’Q

How much do you know about these eye health topics?

A group of eye doctors standing in front of a blue background.

Meet the 3 Os of the eye care team

Learn the difference between an optician, an optometrist and an ophthalmologist.

Follow real patients' eye health journeys

See the inspiring stories of patients facing serious eye conditions, and the ophthalmologists committed to helping to protect and restore their vision.

A woman with glasses is holding a child's hand as they visit an eye doctor for their regular eye health checkup.
A man is having his eyes examined by an optometrist.

Ask the ophthalmologist

Leading Canadian ophthalmologists answer common questions about eye health and safety.

The Canadian Ophthalmological Society (COS) is dedicated to providing all Canadians with optimal medical and surgical eye care.

We developed See The Possibilities as a resource for the Canadian public on the topics of vision health, serious eye diseases and what the COS is doing to promote eye health for everyone.