According to FYidoctors optometrists, high blood pressure (hypertension) can damage the small blood vessels in the retina, a condition called hypertensive retinopathy. High blood pressure often has no symptoms you can feel, and a comprehensive eye exam can help uncover signs of it. Blood pressure control is the main way to manage these changes.
How Does High Blood Pressure Affect Your Eyes?
High blood pressure can narrow and damage the blood vessels in your retina, the light-sensitive layer at the back of your eye. It can also affect the layer beneath the retina and the optic nerve.
These changes can develop over time. Regular eye exams give your optometrist a way to check for them.
How Common Is High Blood Pressure in Canada?
High blood pressure affects about 1 in 4 adults in Canada, according to Hypertension Canada's 2025 guideline. Because it's this common, it's useful to know how it can affect the eyes of the people you care for.
What Blood Pressure Reading Counts as High?
Hypertension Canada defines hypertension in adults as a reading of 130/80 or higher, measured on a validated device. A healthcare provider confirms the diagnosis with repeated readings.
If you care for an aging parent, their doctor can advise on their blood pressure readings.
What Eye Conditions Can High Blood Pressure Cause?
High blood pressure can cause hypertensive retinopathy, choroidopathy and optic neuropathy. It can also make diabetic retinopathy worse.
What Is Hypertensive Retinopathy?
Hypertensive retinopathy is damage to the retina's blood vessels caused by high blood pressure. Changes can include narrowed vessels, leaking vessels, bleeding, and nicking where arteries cross veins.
Our guide to how hypertensive retinopathy affects your eyes explains these changes in more detail.
What Are Hypertensive Choroidopathy and Optic Neuropathy?
Choroidopathy affects the layer beneath the retina and can cause fluid to collect under the retina. Optic neuropathy affects the optic nerve, which carries signals from the eye to the brain.
Both are covered in our guide to how eye exams help detect high blood pressure.
Does High Blood Pressure Affect Diabetic Retinopathy?
Yes. High blood pressure can make diabetic retinopathy worse, so managing both conditions matters if you have diabetes.
You can read more about diabetic retinopathy causes and symptoms.
What Are the Symptoms of High Blood Pressure in the Eyes?
High blood pressure often has no symptoms you can feel. Changes in the retina can be found during a comprehensive eye exam.
See an optometrist if you notice blurry or dim vision, new dark patches in your sight, or red spots on your eye that keep returning.
Are Red Spots on the Eye a Sign of High Blood Pressure?
Not necessarily. A red spot on the white of the eye can have several causes, and an eye exam can help find out why it's there. See an optometrist if red spots keep coming back.
Are Flashes and Floaters Linked to High Blood Pressure?
High blood pressure can cause bleeding in the vitreous, the clear gel inside the eye. Sudden new eye floaters, flashes of light or loss of side vision mean you should contact your eye care provider immediately.
Floaters or flashes with a curtain-like shadow over your vision can be a sign of retinal detachment, which needs immediate attention.
Is High Blood Pressure the Same as High Eye Pressure?
No. Blood pressure is the pressure of blood in your arteries, while eye pressure is the fluid pressure inside your eye. Ocular hypertension means eye pressure that's higher than normal, and it needs monitoring.
Is High Blood Pressure a Risk Factor for Glaucoma?
High blood pressure is listed among the risk factors for glaucoma. Don't change or stop your blood pressure medication on your own; talk to your family doctor and optometrist if you have questions.
When Do Eye Symptoms Need Emergency Care?
If you notice sudden vision loss, contact an eye care provider immediately or seek urgent care. Heart & Stroke notes that stroke is a medical emergency; if you notice signs of a stroke, call 9-1-1.
Which Eye Symptoms Need Immediate Care?
Contact an eye care provider immediately or seek urgent care if you notice:
- Sudden vision loss
- Sudden new floaters, flashes or a curtain-like shadow
- An eye injury or chemical exposure
- Severe eye pain
What Can Your Eye Exam Reveal About Your Heart and Brain?
The retina is the only place in the body where blood vessels can be seen directly. Learn more about why the retina can show signs of high blood pressure.
What Does Your Optometrist Look For?
Your optometrist looks for changes in the retina's blood vessels, such as narrowing, leaking or bleeding. If they see signs that may point to high blood pressure, they may suggest a blood pressure check with your family doctor.
The FYidoctors ultra-wide eye scan captures over 80% of the retina and creates a digital record. This lets your optometrist track changes over time.
Is There a Link Between Eye Changes and Stroke Risk?
Heart & Stroke notes that high blood pressure is the number one risk factor for stroke. Signs of high blood pressure in the retina are one reason your optometrist may suggest following up with your family doctor.
FYidoctors optometrists can work with your family doctor, so eye findings become part of your overall care.
Can Eye Damage From High Blood Pressure Be Reversed?
Some changes may improve once blood pressure is controlled, but severe damage may not be reversible. Blood pressure control is the main way to manage hypertensive retinopathy.
Your optometrist and family doctor can advise on your follow-up schedule.
How Can You Protect Your Family's Eyes From High Blood Pressure?
Managing blood pressure and having regular eye exams are two practical steps for everyone in your family.
Which Everyday Habits Help Your Blood Pressure?
Hypertension Canada's guideline recommends lifestyle changes for all adults with hypertension. Heart & Stroke suggests these steps:
- Keep sodium under 2,300 mg a day; Health Canada notes most sodium in our diet is added during processing.
- Choose foods that are sources of potassium.
- Aim for at least 150 minutes of moderate activity a week.
- Take any blood pressure medication as directed.
How Often Should Your Family Have Eye Exams?
The Canadian Association of Optometrists recommends a comprehensive eye exam at least every 2 years for adults aged 20 to 64. From age 65, or with diabetes, the minimum is once a year. The association notes that an eye exam can uncover signs of conditions such as hypertension.
If you look after an aging parent, you can book their exam alongside your own. Eye exam coverage varies by province, age and medical condition, so confirm with your clinic. FYidoctors offers doctor-led care across 300+ clinics in Canada.
How Can You Book an Eye Exam?
You can book a comprehensive eye exam at a clinic near you.
Book an appointment for an eye exam or find a location near you.