Article de blogue

What Happens When Diabetes Isn't Well Managed?

Diabetes Awareness Month has come to an end, but the conversation about diabetes and eye health remains critically important. The November 18, 2025 national webinar from the Canadian Association of Optometrists featured Dr. Tom Wilk, optometrist and owner of Mountain View Optometry in Calgary, Alberta. Dr. Wilk explored what happens when diabetes is not well managed, and why early detection and accessible eye care are essential in diabetes management.

Diabetes in Canada is a Growing Epidemic1

More than five million Canadians are living with diabetes. Every three minutes, another Canadian receives a diabetes diagnosis and type 2 diabetes makes up 90% of cases. People with diabetes are 25 times more likely to become blind than the general population. The high glucose levels present in those with diabetes can damage the body’s small blood vessels, including those supplying the eyes, kidneys, and heart. Without proper management, diabetes can lead to a shortened lifespan by up to 15 years and is the leading cause of vision loss in working-age adults in Canada. 

Diabetes Affects Vision

Poorly managed diabetes increases the risk of serious eye diseases like macular degeneration, glaucoma and diabetic retinopathy. These diseases often have no symptoms in their early stages, but early diagnosis and treatment can slow the progress of disease.

  • Macular degeneration affects approximately 2.5 million Canadians and leads to loss of central vision.
  • Glaucoma affects approximately 750,000 Canadians and leads to loss of peripheral vision.
  • Diabetic retinopathy affects approximately one million Canadians. As it progresses individuals may experience cloudy vision, blind spots, or floaters. Left untreated, it can lead to permanent vision loss. 

Regular eye examinations are important even without a diagnosis. Twenty percent of people with diabetes had diabetic retinopathy before they were even diagnosed with diabetes2, underscoring the importance of routine eye examinations in early detection.

The Cost of Poorly Managed Diabetes

Between 2008 and 2019, the national cost of diabetes doubled, reaching $30 billion per year1. Direct costs include medications, specialty visits, continuous glucose monitors, mental health supports, and lifestyle counseling. Indirect costs include absenteeism, disability, and reduced productivity, all of which add an enormous additional burden. 

Serious, chronic complications of diabetes are the primary driver of increased costs and are far more expensive to treat than well-managed diabetes. Managing diabetes-related eye disease often requires more frequent monitoring, specialists’ visits and treatments, but without the management of disease, the cost of vision loss will be even higher.

Coverage Gaps in Canada

Many Canadians still face barriers to access to appropriate vision care due to inadequate coverage and high out of pocket costs. Recommendations for private vision benefits plans include coverage for Optical Coherence Tomography (OCT) and widefield retinal imaging. With these tests, diabetes and its visual consequences are detected earlier. This leads to reduced costs of late stage treatment and management. 

Early detection saves sight, saves money, and saves lives.


References

  1. Diabetes Canada. Diabetes in Canada. National and provincial backgrounders. Ottawa (ON): Diabetes Canada; 2024. https://www.diabetes.ca/en-CA/advocacy-policies/advocacy-reports/national-and-provincial-backgrounders/diabetes-in-canada.
  2. Creuzot C. Rétinopathie Diabétique. Collégedes Ophtalmologistes Universitaires de France (COUF). 2021
Image
Diabetes blood sugar monitoring device

What Happens When Diabetes Isn't Well Managed?