What is thyroid eye disease?

Thyroid eye disease (thyroid orbitopathy or TO) is a condition that causes the muscles and soft tissues of the eye socket to swell. It happens when you have a problem with your thyroid gland. You may also hear it being called Graves’ disease.

The condition most commonly occurs in association with an overactive thyroid gland, but can also occur if you have an underactive thyroid gland. The biggest problem associated with thyroid disease is dry eyes, see What is dry eye?

More information can be found on our thyroid eye disease web page.

We also have thyroid eye disease factsheet: 

For more information about thyroid eye disease, dry eye and other eye conditions please contact our Helpline:

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