Eye health resource
Can High Blood Pressure Lead to Vision Loss?
High blood pressure can damage blood vessels in the eye and, in severe cases, threaten vision. Learn what hypertensive eye changes can look like and why blood-pressure control and eye care both matter.
Reviewed for accuracy by Justin Bazan, OD on .
Yes. High blood pressure can damage blood vessels in the eye and, in severe or prolonged cases, can contribute to vision loss. The eye is one of the few places where a doctor can directly examine small blood vessels, so retinal changes may sometimes provide visible evidence of vascular stress.
Eye findings do not replace blood-pressure measurement or medical care. Hypertension is diagnosed and managed by your medical team, and protecting your vision depends in part on controlling the underlying blood pressure.
What Is Hypertensive Retinopathy?
The retina is the light-sensitive tissue lining the back of the eye. Chronic high blood pressure can cause retinal arteries to narrow and can change the way retinal blood vessels appear.
More severe hypertension can lead to leakage, bleeding, swelling, cotton-wool spots, or optic-disc swelling. The pattern and severity of the findings matter because some changes may reflect significant systemic blood-pressure disease as well as risk to the eye.
Other Ways High Blood Pressure Can Affect the Eye
Hypertension is associated with several kinds of ocular vascular damage, including:
- Hypertensive retinopathy — damage or visible changes in retinal blood vessels.
- Choroidopathy — impaired circulation in the vascular layer beneath the retina, which is more often seen with severe acute hypertension.
- Optic neuropathy — damage involving blood supply to the optic nerve.
- Retinal artery or vein occlusion — blockage of a retinal blood vessel, which can cause sudden or significant vision loss.
High blood pressure also increases the risk of stroke. A stroke can affect vision when it involves the visual pathways in the brain.
Can an Eye Exam Detect High Blood Pressure?
An eye doctor may see retinal changes that are associated with hypertension, but an eye exam does not diagnose high blood pressure by itself. Blood pressure needs to be measured directly, and medical evaluation determines whether hypertension is present and how it should be treated.
If we see retinal vascular changes that raise concern, we may recommend follow-up with your primary-care physician or another medical professional. In some situations, the urgency of that follow-up depends on the severity of the eye findings and your symptoms.
What Symptoms Can Hypertensive Eye Disease Cause?
Mild or chronic retinal vascular changes may cause no noticeable symptoms. More significant disease can cause blurred vision, reduced vision, visual-field changes, or sudden vision loss.
Sudden vision loss, a new dark area or curtain in vision, severe eye pain, new neurologic symptoms, or major vision change with a severe headache requires prompt emergency evaluation. Do not wait for a routine eye appointment when symptoms are sudden or severe.
How Do You Protect Your Eyes If You Have Hypertension?
The most important step is to work with your medical team to manage your blood pressure and other cardiovascular risk factors. Eye care complements that medical management; it does not replace it.
A comprehensive eye exam can document the retina and optic nerve and look for eye disease that may be related to hypertension, diabetes, aging, or other risk factors. At Park Slope Eye, retinal imaging may also provide photographs that can be compared over time when appropriate.
High Blood Pressure, Diabetes, and Eye Risk
Hypertension and diabetes can both damage small blood vessels. For a person with diabetes, controlling blood pressure is an important part of reducing the risk of diabetic eye complications as well as cardiovascular disease.
If you have hypertension, diabetes, or another medical condition that can affect the eyes, tell your eye doctor so that the examination can be interpreted in the context of your overall health.
Medical Eye Care at Park Slope Eye
Park Slope Eye provides medical eye care and comprehensive eye exams. When an eye-health condition is the reason for the visit, medical insurance may apply if we are in network with your plan.
If you have hypertension and are due for an eye-health evaluation, book an appointment.
Originally published . Substantially updated .