Thyroid eye disease (TED) is an eye condition that causes the muscles and soft tissues in and around your eye socket to swell. TED usually happens when you have a problem with your thyroid gland.

TED may also be called thyroid associated ophthalmopathy (TAO), thyroid orbitopathy, Graves’ orbitopathy or Graves’ ophthalmopathy (GO).

The period of inflammation and swelling caused by TED is known as the "active" stage. This generally resolves on its own over a period of about six months to two years. After this, the inflammation settles, and this is known as the "inactive" or "burnt out" stage.

This page contains a summary of our information on TED. To read our full information, download our factsheet:

Download our thyroid eye disease factsheet in Word