Thyroid Eye Disease

What is Thyroid Eye Disease?

Thyroid Eye Disease is an autoimmune condition that affects the muscles and tissues around your eyes. It happens when your immune system attacks the fat and muscles behind your eyeballs. This causes inflammation, swelling, and a range of eye problems that can affect how you look and see.

The condition is also called Graves' Ophthalmopathy or Graves' Eye Disease. It most often occurs in people with Graves' disease, an autoimmune thyroid disorder. About 25 to 50 out of every 100 people with Graves' disease develop eye symptoms. The disease can also appear in people with normal thyroid function or underactive thyroid, though this is less common.

Thyroid Eye Disease develops when antibodies called thyroid-stimulating immunoglobulins, or TSI, mistakenly target tissues around your eyes. These antibodies cause the eye muscles and fatty tissue to swell and become inflamed. The extra tissue pushes your eyes forward, creating a bulging appearance. The condition can affect one or both eyes and ranges from mild to severe.

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Symptoms

Bulging eyes, also called proptosis or exophthalmos
Gritty, dry, or watery eyes
Redness and swelling of the eyelids
Eye pain or pressure, especially when looking up or to the side
Double vision, known as diplopia
Sensitivity to light
Trouble closing your eyelids completely
Blurred vision or vision loss in severe cases
Visible whites of the eyes above or below the iris
Difficulty moving your eyes smoothly

Some people have mild symptoms that stay stable for years. Others experience rapid worsening over weeks or months. The disease often goes through an active phase where symptoms worsen, followed by a stable phase where changes stop but damage may remain.

Causes and risk factors

Thyroid Eye Disease is caused by an autoimmune response where your body produces antibodies that attack tissues around your eyes. TSI antibodies are the main culprits. These same antibodies often stimulate your thyroid gland in Graves' disease. The exact trigger for this immune system malfunction is not fully understood. Genetics play a role, as the condition runs in families. Environmental factors like infections or stress may also trigger the disease in people who are already predisposed.

Several risk factors increase your chances of developing Thyroid Eye Disease. Smoking is the biggest controllable risk factor, making symptoms worse and harder to treat. Women develop the condition more often than men, though men tend to have more severe disease. Age matters too, with most cases appearing between ages 30 and 50. Having Graves' disease or other autoimmune conditions raises your risk significantly. Radioactive iodine treatment for thyroid problems can sometimes worsen eye symptoms, especially in smokers.

How it's diagnosed

Doctors diagnose Thyroid Eye Disease through a combination of physical examination and testing. An eye doctor will measure how far your eyes bulge forward using a tool called an exophthalmometer. They will also test your eye movements, check your vision, and examine the health of your cornea and optic nerve. Imaging tests like CT or MRI scans can show swelling of the eye muscles and tissues. These scans help determine how severe the disease is and guide treatment decisions.

Blood tests play a key role in understanding the underlying cause. TSI testing measures the level of thyroid-stimulating immunoglobulins in your blood. High TSI levels indicate active autoimmune activity and help confirm the diagnosis. Rite Aid offers TSI testing as an add-on to our flagship panel. Testing your thyroid function with other markers helps your doctor understand the complete picture. Regular monitoring of TSI levels can track disease activity and help guide treatment timing.

Treatment options

Quit smoking immediately, as tobacco makes the disease worse and limits treatment success
Use artificial tears and lubricating eye ointments to relieve dryness and irritation
Sleep with your head elevated to reduce eye swelling overnight
Wear sunglasses to protect sensitive eyes from bright light and wind
Apply cool compresses to reduce inflammation and discomfort
Take selenium supplements, which may reduce inflammation in mild cases
Use corticosteroids like prednisone to reduce inflammation during active disease phases
Consider biologic medications like teprotumumab for moderate to severe active disease
Undergo orbital decompression surgery to create more space for swollen tissues
Get eye muscle surgery to correct double vision once the disease stabilizes
Have eyelid surgery to improve appearance and protect the cornea

Frequently asked questions

Graves' disease is an autoimmune condition that causes your thyroid to make too much hormone. Thyroid Eye Disease is a related condition that specifically affects the tissues around your eyes. About 25 to 50 out of every 100 people with Graves' disease develop eye symptoms. You can have one condition without the other, though they often occur together.

In most cases, Thyroid Eye Disease does not cause permanent vision loss. However, severe cases can compress the optic nerve, leading to vision damage if not treated quickly. This happens in fewer than 5 out of every 100 people with the condition. Early diagnosis and treatment can prevent serious complications and protect your vision.

The active inflammatory phase typically lasts 6 to 24 months. During this time, symptoms may worsen or change. After the active phase, the disease usually enters a stable phase where inflammation stops but changes may remain. Some people need surgery after the disease stabilizes to correct bulging eyes, double vision, or eyelid problems.

Yes, quitting smoking is one of the most important things you can do. Smokers are 8 times more likely to develop Thyroid Eye Disease than nonsmokers. Smoking makes symptoms worse, slows healing, and reduces the success rate of treatments. People who quit smoking often see improvement in their symptoms and respond better to medical treatment.

TSI stands for thyroid-stimulating immunoglobulins. This test measures antibodies that attack your thyroid and the tissues around your eyes. High TSI levels indicate active autoimmune activity and help confirm Thyroid Eye Disease. The test also helps doctors monitor disease activity and decide when to start or adjust treatment.

Yes, you can have Thyroid Eye Disease even if your thyroid hormone levels are normal. About 10 out of every 100 people with the eye condition have normal thyroid function when diagnosed. Some people develop thyroid problems before the eye disease, while others develop them afterward. Regular thyroid monitoring is important even if your initial tests are normal.

Teprotumumab is a biologic medication approved specifically for Thyroid Eye Disease. It blocks a protein called IGF-1 receptor that contributes to inflammation and tissue expansion behind the eyes. The medication is given through an IV infusion every 3 weeks for a total of 8 doses. Studies show it can reduce eye bulging and double vision in people with active, moderate to severe disease.

See a doctor right away if you notice sudden eye bulging, severe eye pain, or vision changes. You should also get evaluated for persistent dry eyes, double vision, or trouble closing your eyelids. Early treatment can prevent complications and protect your vision. If you have Graves' disease or other thyroid problems, regular eye exams help catch problems early.

Some people see significant improvement with medical treatment, especially if started early. However, many people have lasting changes like mild eye bulging or eyelid retraction after the inflammation stops. Surgery can often restore a more normal appearance and function once the disease becomes inactive. The outcome depends on disease severity and how quickly treatment begins.

Stress may trigger or worsen autoimmune conditions, though direct evidence for Thyroid Eye Disease is limited. Many people report that their symptoms appeared after stressful life events. Managing stress through healthy sleep, regular exercise, and relaxation techniques supports overall immune health. Focus on controllable risk factors like quitting smoking and following your treatment plan.