What causes protruding eyes? 9 possible conditions

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Bulging Eyes

Eyes that bulge, or protrude out of their normal position, could be an indication of a serious medical condition. Proptosis and exophthalmos are the medical terms used to describe bulging eyes.

In most cases, the white part of the eye should not be visible over the iris (top of the colored part of the eye). If the white of your eyes show between the iris and your upper eyelid, this is often considered abnormal bulging. Treatment will be based on the diagnosis. However, some individuals have the hereditary trait of prominent eyes, in which the white part of the eyes is more prominent and visible.

Bulging in only one eye of a child is a particularly serious sign. Seek medical attention immediately.

Causes of Bulging Eyes

The most common cause of bulging eyes is hyperthyroidism (an overactive thyroid). Your thyroid gland is located in the front of your neck. It releases several hormones that control metabolism. Hyperthyroidism is when your thyroid releases too many of these hormones over a short and concentrated or long period.

An autoimmune disorder called Graves disease is the most common cause of hyperthyroidism and of bulging eyes. Tissues around the eye become inflamed, thus creating the bulging effect. Anyone can get Graves disease, but women over the age of 20 are most at risk.

Other causes of bulging eyes include:

  • hyperthyroidism caused by medications used for other conditions
  • bleeding behind the eye caused by injury
  • glaucoma (fluid pressure in the eye that causes optic nerve damage)
  • hemangioma (an abnormal buildup of blood vessels in the internal organs or in the skin)
  • histiocytosis (a group of syndromes in which there is an abnormal increase in the number of immune cells)
  • leukemia (cancer of the white blood cells)
  • neuroblastoma (cancer of the nerve tissue)
  • orbital cellulitis (infection of tissues around the eye)
  • periorbital cellulitis (infection of the eyelid or the skin around the eye)
  • rhabdomyosarcoma (cancerous tumor of the muscles that are attached to bones)
  • vascular disorders (disorders affecting the circulatory system)

Diagnosis of Bulging Eyes

Bulging in only one eye of a child is a particularly serious sign that requires immediate medical attention.

If you have a bulging eye or eyes, make an appointment for a thorough medical exam as soon as possible. Be prepared to provide your doctor with your complete medical history. Your doctor will also want to know the specifics of your symptoms, such as:

  • When did you first notice that your eyes were bulging?
  • Have they gotten worse since that time?
  • Do you have any other symptoms? If so, what are they?
  • Do you take any prescription or over-the-counter medications or supplements?

After a physical exam, your doctor may order additional tests. These may include:

  • slit-lamp exam (uses a low-power microscope along with a high-intensity light to examine the structures at the front of the eye)
  • blood tests (to check for thyroid diseases)
  • imaging tests, including computed tomography (CT) or magnetic resonance imaging (MRI)

Treatment for Bulging Eyes

Any treatment for bulging eyes will depend entirely on the cause, but may include:

  • eye drops
  • sunglasses
  • corticosteroids to ease inflammation
  • surgical procedures to repair damaged arteries and veins
  • surgery, chemotherapy, and radiation to treat tumors

Treatment for thyroid disease, including Graves disease, may include:

  • beta-blockers, such as propranolol
  • antithyroid medications
  • surgery to remove the thyroid
  • radioactive iodine to destroy the thyroid, thereby stopping hormone production (this treatment can occasionally make eye problems worsen)
  • replacement hormones (if surgery or radiation was performed to destroy the thyroid)

Eye problems associated with hyperthyroidism can be worse for people who smoke, so quitting may help to lessen eye bulging.

Bulging eyes may lower self-esteem or cause self-consciousness in affected individuals, so emotional support is important as well.

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See a list of possible causes in order from the most common to the least.

1

Hyperthyroidism

The thyroid gland produces a hormone that controls how your cells use energy (metabolize). Hyperthyroidism occurs when the body produces excessive amounts, causing rapid heart rates, weight loss, and heat intolerance.

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2

Graves' Disease

Graves disease is an autoimmune disorder that leads to hyperthyroidism and causes thyroid swelling.

Read more »

3

Neuroblastoma

Neuroblastoma is a rare cancer that develops in tissues of the sympathetic nervous system (the system that carries brain signals to the body). Early symptoms of the cancer can include fever, diarrhea, and others.

Read more »

4

Glaucoma

Glaucoma is a term for several eye conditions that can damage your optic nerve. It has many types, and over time it can lead to vision loss.

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5

Leukemia

Leukemia is a cancer of the blood cells. Excessive sweating at night, constant fatigue, weight loss, bone pain, and easy bleeding or bruising are all signs of this disease.

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6

Cellulitis of Eyelid (Orbital Cellulitis)

Cellulitis of the eyelid is an infection caused by bacteria that occur around the eyelid. The disease may also be called preseptal cellulitis or periorbital cellulitis. The infection causes fever, redness, and swellin...

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7

Hemangioma

Hemangiomas are noncancerous growths that form due to an abnormal collection of blood vessels. They are usually found on the skin or internal organs-particularly the liver. Because they are congenital, most peopl...

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8

Soft Tissue Sarcoma (Rhabdomyosarcoma)

Sarcoma is a type of cancer that develops in bone or soft tissue. Soft tissue includes blood vessels, nerves, tendons, muscles, fat, fibrous tissue, lower layers of the skin (in other words, not the outside layer), an...

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9

Burkitt's Lymphoma

Burkitt's lymphoma is a relatively rare and aggressive form of non-Hodgkin's lymphoma, a type of cancer of the lymphatic system. It's most common in children living in sub-Saharan Africa.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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