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NHS Choices - Treating exophthalmos

(20/10/2014)

Treatment for exophthalmos (bulging eyes), will largely depend on what is causing the problem.

In some cases, an ophthalmologist (eye specialist) may feel that immediate treatment is not necessary, in which case you may be advised to have regular examinations to monitor your condition.

Treating thyroid eye disease

If you have thyroid eye disease, your treatment may involve several different stages. This is because the condition tends to progress through two main phases:

  • an "active" phase  when symptoms caused by inflammation of the eyes, such as dryness and redness, are prominent and you may be at risk of vision problems
  • an "inactive" phase  when the condition has "burnt out" and many of the symptoms settle down, but you may be left with some long-term problems (including protruding eyes)

Typically, the initial active phase lasts for between several months and around two years.

Some of the main treatments you may be offered if you have thyroid eye disease are described below.

Correcting thyroid hormone levels

If you have an overactive thyroid gland (hyperthyroidism) or an underactive thyroid gland (hypothyroidism), you will usually be offered medication to help correct the level of thyroid hormones in your blood.

For example, an overactive thyroid can be treated with medication such as thionamides, which prevent your thyroid gland producing excess amounts of thyroid hormones.

Treating your thyroid problems will not necessarily improve your eye-related symptoms, but it may help prevent other problems associated with abnormal thyroid levels. It may also help the problems affecting your eyes from getting worse.

Read more about treating an overactive thyroid gland and treating an underactive thyroid gland.

General measures 

You may also be advised about things you can do, and treatments that are available, to relieve some of the symptoms associated with the active phase of thyroid eye disease.

These include:

  • stopping smoking if you smoke, as it can significantly increase the risk of eye problems becoming more severe
  • raising the head of your bed – for example, by using extra pillows – which may help reduce some of the puffiness around your eyes
  • wearing sunglasses if you have photophobia (sensitivity to light)
  • trying to avoid exposing your eyes to irritants such as dust
  • using eye drops to help relieve soreness and to moisten your eyes if you have dry eyes
  • wearing glasses containing special prisms designed to help correct double vision

If your thyroid eye disease is mild, these measures – along with the medications to correct your thyroid hormone levels mentioned above – may be all the treatment you need.

Corticosteroids

In more severe cases, when the eyes are particularly painful and inflamed during the active stage of thyroid eye disease, a type of medication called a corticosteroid may be recommended by your doctor.

Corticosteroids are powerful medications that can help bring the inflammation associated with thyroid eye disease under control, and can help ensure the condition is stable before any type of surgery (see below) is considered.

In many cases, corticosteroids given directly into a vein (intravenously) will be recommended, because taking corticosteroid tablets over a long period of time can have significant side effects.

A typical course of treatment with intravenous corticosteroids will involve weekly treatments over a 10-12 week period. You should start to notice an improvement in your condition after a week or two.

Severe side effects of intravenous corticosteroids are uncommon, but you may experience some short-lived problems for a few days following the treatment sessions, such as feeling agitated, having difficulty sleeping, headaches, and blushing of the neck and face.

Read more about the side effects of corticosteroids.

Radiotherapy

Occasionally, orbital or retrobulbar radiotherapy may be considered during the active stage of thyroid eye disease if corticosteroids have not been effective. It may also be combined with corticosteroids.

This treatment uses high-energy radiation, usually X-rays, to destroy cells. Low doses of radiation can be used on the tissues and muscles in the eye socket to help reduce the swelling.

During treatment, you will lie down and a special shell will be placed over your head to keep it still. A machine will then be used to carefully direct beams of radiation at the area being treated.

This is usually done on an outpatient basis, which means you won't need to stay in hospital overnight, and will typically involve around 10 treatment sessions over a two-week period.

Radiotherapy can cause some side effects, although these should be minimal as the treatment will be confined to a specific area and shouldn't affect other parts of your body. However, possible side effects may include the short-term worsening of your eye symptoms, cataracts and, in rare cases, sight-threatening retinopathy (damage to the layer of tissue at the back of your eye).

Surgery

In some cases, surgery may be considered as a treatment for exophthalmos if you have severe or persistent symptoms.

For example, surgery may be considered to improve the appearance of the eyes if exophthalmos has been in the inactive phase for a few months, as medical treatment alone will not necessarily reverse the protrusion of the eyes.

It may be carried out during the active phase of thyroid eye disease as well if there is an immediate threat to your vision due to compression of the optic nerve (which transmits signals from the eye to the brain).

Surgery may also be effective if the exophthalmos is caused by other problems, such as issues with the blood vessels behind the eyes.

Types of surgery

There are three main types of surgery that may be carried out on people with exophthalmos, although it is unusual for someone to have all three. These are: 

  • orbital decompression surgery – (see below) where a small amount of bone is removed from your eye socket(s)
  • eyelid surgery  where surgery is carried out to improve the position, closure or appearance of the eyelids
  • eye muscle surgery  where surgery is carried out on your eye muscles to bring your eyes into alignment and reduce double vision

These procedures are usually carried out under general anaesthetic, which means you will be asleep. Depending on the type and extent of the operation you have, you may need to stay in hospital for up to a few days afterwards.

Orbital decompression surgery

Orbital decompression surgery is most often carried out to improve the appearance of the eyes of people with thyroid eye disease who are affected by exophthalmos. It may also be required to reduce any pressure on the optic nerve.

During the procedure, a small amount of bone will be removed from your eye sockets (orbits) and some of the fat surrounding the socket may also be removed.

This allows any excess tissue that is pushing the eyeballs forward to move down into the space below. It also allows your eyes to sit further back in your head, so they do not protrude forward as much.

This procedure is carried out under general anaesthetic and will normally involve making incisions near where your eyelids meet in the inner corner of your eyes (the point nearest the nose). You may need to stay in hospital for a day or two after this procedure, so your recovery can be closely monitored.

Possible complications that can occur following orbital decompression surgery include persistent double vision, a build-up of blood in the eye socket (haematoma), and an infection where the incision is made.

If you are considering having orbital decompression surgery, ask your doctor or surgeon to explain the benefits and risks of the procedure to you.

Treating other causes of exophthalmos

For most other problems that cause exophthalmos, treatment will vary, depending on the underlying cause.

For example, if you have an infection affecting the tissue in your eye socket, such as cellulitis, your ophthalmologist may prescribe antibiotics to treat the infection. They may also need to carry out a procedure to drain any abscesses that have developed.

If you have a tumour behind your eye, your doctors will discuss treatment options with you. For most types of cancer, treatment will involve one or more of the following:

  • chemotherapy – where medication is used to kill the cancerous cells
  • radiotherapy – where radiation is used to kill the cancerous cells
  • surgery to remove the cancerous tumour