Retinopathy: What It Is and What Hypertensive Retinopathy Is

You opened a report and saw an unfamiliar word, "retinopathy" — or a doctor mentioned it in connection with blood pressure. It sounds alarming, but behind the term is a clear concept: damage to the retina, the thin tissue deep inside the eye. Let's look at what this means in practice and what it means for vision.

Retinopathy: What It Is

The retina is a layer of tissue at the back of the eye that converts light and images into nerve signals for the brain. Retinopathy is a general term for damage to this tissue and disturbances in its blood circulation. There are many causes: high blood pressure, diabetes, autoimmune diseases, anemia, radiation exposure, central retinal vein occlusion. That is why the same word in a report can describe different conditions, and clarification from a doctor is not a formality here.

Hypertensive Retinopathy: How High Blood Pressure Affects the Retinal Vessels

Hypertensive retinopathy is damage to the retina caused by high blood pressure. The higher the pressure and the longer it persists, the more serious the changes. The risk of damage and vision loss increases if there is diabetes, high cholesterol, or smoking. The doctor describes the picture by grades from 1 to 4: at grade 1 there are usually no symptoms; at grades 2–3, vessel changes, fluid leakage, and swelling of areas of the retina appear; at grade 4, swelling of the optic disc and the central area of the retina occurs, which can reduce vision. Mild signs are also found in people without hypertension — in approximately 3–14% of adults over 40.

Other Causes of Retinopathy

Diabetic retinopathy develops when high glucose levels damage the retinal vessels. It occurs more often with long-standing diabetes, high blood pressure, and cholesterol. A similar picture is caused by autoimmune diseases, anemia, radiation exposure, and central retinal vein occlusion — which is why the diagnosis is always clarified.

Symptoms: When They Are Present and When They Are Absent

Most often there are no symptoms, especially in the early stages, and changes are found incidentally during an examination. Later, the following are possible:

• worsening of vision, blurriness;
• spots and lines ("floaters") in the field of vision;
• difficulty in poor lighting;
• double vision, dim vision or vision loss, headaches.

A quick self-check: compare whether you see text equally well with each eye in turn and whether new "floaters" have appeared. This is not a diagnosis, but a reason to book an appointment.

How Retinopathy Is Detected During a Fundus Examination

The doctor examines the fundus through an ophthalmoscope: looking for narrowing of the vessels and signs of fluid leakage. The degree of changes is assessed on a scale from 1 to 4. Sometimes a special test is needed to examine the vessels. In diabetes, the fundus is examined regularly, including with retinal photographs.

Possible Complications and When to See a Doctor

With blood pressure control, the retina in most cases recovers, but at grade 4 there may be persistent damage to the nerve or the center of the retina. People with severe retinopathy more often have heart and kidney problems and a higher risk of stroke. If you have diabetes and worsening vision, "floaters," or poor vision in the dark, see a doctor (ophthalmologist).

Retinopathy by itself is not a reason to call an ambulance. Call 103 or 112 if, against a background of high blood pressure, your vision suddenly changes or a severe headache appears.

This material is for reference: it helps you understand a report but does not replace a doctor's consultation.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer