High blood pressure, or hypertension, can affect more than your heart. Over time, elevated blood pressure can damage the small blood vessels in the eyes, particularly those supplying the retina. Because eye damage may develop without noticeable symptoms, understanding the connection between hypertension and eye health is an important part of protecting your vision. 1
How High Blood Pressure Affects Your Eyes
Many hypertension-related eye conditions can develop before noticeable vision changes occur. A comprehensive eye exam allows an eye care professional to look for changes in the retinal blood vessels and other signs of eye damage. Regular exams are particularly important for people with high blood pressure, and early detection can help support timely treatment and ongoing monitoring 5 of some of the following:
Hypertensive Retinopathy: Long-term high blood pressure can cause the blood vessels in the retina to become damaged causing reduced blood flow which can contribute to vision loss. 1
Choroidopathy: A sudden or significant rise in blood pressure can cause fluid to build up beneath the retina. This may lead to distorted or blurred vision and, in some cases, scarring2.
Optic Neuropathy: When blood flow to the optic nerve is blocked or reduced, nerve cells can be damaged. This can interfere with the transmission of visual information to the brain and may result in vision loss. 2
Retinal Vascular Occlusion: High blood pressure is also associated with an increased risk of retinal artery or vein occlusion, which occurs when a blood vessel supplying or draining the retina becomes blocked. These blockages can cause sudden, painless vision loss in one eye. 3
Know When to Seek Care
Sudden changes in vision should always be taken seriously. Seek prompt medical attention if you experience:
- Sudden vision loss, particularly in one eye
- New flashes or a sudden increase in floaters
- A dark curtain or shadow across your vision
- Sudden or significant changes in vision
- Vision changes accompanied by a severe headache or other concerning symptoms4
Managing blood pressure is an important part of protecting your eyes and overall health. Follow your healthcare provider’s recommendations, take prescribed medications as directed, stay physically active, maintain a heart-healthy diet and limit sodium. 3
Sources
- Cleveland Clinic. Hypertensive Retinopathy: Causes, Symptoms & Treatment.
- American Heart Association. How High Blood Pressure Can Lead to Vision Loss.
- Iowa Eye Center. Ask the Doctor: “Can High Blood Pressure Affect My Vision?”
- New Vision Eye Center. How High Blood Pressure Impacts Your Vision and Eye Health.
- NeoRetina. High Blood Pressure and Vision: How Your Eyes Show the Warning Signs.