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How Hypertension Affects the Eyes

6 Sep

The eye works by focusing visual images onto the retina, a sheet of nerve tissue at the back of the eyeball. Immediately behind the retina lies a network of tiny blood vessels that keeps this tissue richly supplied with oxygen and nutrients. Hypertension can cause these arteries to narrow or break and bleed into the retina. It can also lead to swelling of the optic nerve, which carries images to the brain. In patients with longstanding, untreated hypertension, the result can be impaired vision and even blindness.

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