Understanding the Stages of Thyroid Eye Disease (TED) – A patient guide
What is Thyroid Eye Disease?
Thyroid Eye Disease (TED) — also known as Graves’ orbitopathy or thyroid-associated orbitopathy — is an autoimmune condition that affects the muscles and soft tissues around the eyes.
It usually occurs in people with thyroid problems, most commonly an overactive thyroid (hyperthyroidism) due to Graves’ disease.
TED can cause swelling, redness, and discomfort around the eyes. In more serious cases, it can also affect eye movement and vision.
💡 Did you know?
Around 40% of people with Graves’ disease, or about 50% of people with any thyroid condition, go on to develop TED. That’s why recognising early signs is so important.
The Two Stages of Thyroid Eye Disease
TED typically develops in two phases:
🟠 1. Active Phase (Inflammatory Stage)
This phase usually lasts 6 months to 2 years and is when symptoms appear and may get worse.
Common symptoms include:
- Red or swollen eyes
- Dry or watery eyes
- A gritty or burning feeling
- Puffy or retracted eyelids
- Bulging eyes
- Sensitivity to light
- Double vision
- Pain or pressure behind the eyes
➡️ This is when treatment can help reduce inflammation and prevent damage.
🟢 2. Inactive Phase (Stable or “Burnt-Out” Stage)
This phase begins when inflammation settles and symptoms stop worsening. However, some effects — like bulging or double vision — may remain.
In the inactive phase:
- Redness and swelling reduce
- Eyes become more stable
- Vision issues may continue
- Surgery (e.g. to correct vision or eye appearance) may be considered
How Is TED Diagnosed in the UK?
Diagnosis usually starts with your GP or thyroid specialist, who may refer you to an ophthalmologist (eye doctor).
You might have:
- ✅ A symptom review (your doctor will ask about your thyroid history and eye issues)
- ✅ Eye tests (to check movement, inflammation, and bulging)
- ✅ Blood tests (to measure thyroid hormones and detect thyroid antibodies)
- ✅ Imaging (CT or MRI scans may be used to confirm TED and assess the tissues behind the eyes)
Why Early Diagnosis Matters
If TED is diagnosed during the active phase, treatment is more effective. It can:
- Reduce inflammation
- Protect your vision
- Prevent long-term damage
Severe complications like vision loss are rare, but early care makes a big difference to quality of life.
Treatment Options
Treatment depends on the stage and severity of your condition. You may be offered:
- 👁️ Eye drops – for dryness or discomfort
- 💊 Steroids – to reduce swelling in the active phase
- ☢️ Radiotherapy or immunosuppressants – in some cases
- 👓 Prism glasses – to help with double vision
- 🏥 Surgery – only considered once TED is inactive
- 🚭 Support to stop smoking – smoking worsens TED and reduces treatment success
Support and Community
TED can be isolating — but you’re not alone. Support groups offer a place to ask questions, share experiences, and get reliable information.
🟦 TEDct (Thyroid Eye Disease Charitable Trust)
You’re already on the right website! TEDct offers:
- Patient information
- Expert-led resources
- Stories from others living with TED
📘 Facebook Group: Thyroid Eye Disease Support UK
This is a private, patient-led community where people affected by TED can share advice and get support in a safe, understanding space.
Final Thoughts
If you have a thyroid condition and notice any changes in your eyes — no matter how small — don’t wait. Speak to your GP or specialist.
💬 The sooner you act, the better your chances of managing TED and protecting your sight.
Support is available. You don’t have to go through this alone.