What is Uveitis?

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Uveitis is a broad term used to describe an inflammation of the uveal tract of the eye.

The uveal tract is composed of:

• The iris: the part of the eye making up a person’s eye color
• The ciliary body: a small muscle behind the iris
• The choroid: a layer of tissue between the retina (a light sensitive inner coat of the eye), and the sclera (the dense connective tissue that forms the white of the eye)

The uveal tract is an area containing a large proportion of the eyes’ blood vessels.[^1]

Uveitis typically causes pain and blurred vision, but can, in the majority of cases, be successfully treated through the use of medication. However, if left untreated, the condition can lead to complications including glaucoma, cataracts, and possible blindness.^[1]

Uveitis is a relatively rare condition, affecting roughly 2-5 people in every 10,000. It can affect people of any age, though is most common in those aged 20 to 59.^[2]

Types of uveitis

There are various types of uveitis, each classified according to the part of the uveal tract the inflammation affects:

• Anterior uveitis: Affecting the front section of the uveal tract. This is the most common form of the condition and is typically caused by infection, inflammatory diseases or trauma, e.g. blunt force to the eye.
• Intermediate uveitis: Affecting the middle section of the uveal tract. Typically caused by diseases such as sarcoidosis.
• Posterior uveitis: Affecting the rear of the uveal tract. This is a rare form of the condition.
• Panuveitis: When the condition affects the entirety of the uveal tract. This is the most severe form of the condition, which can lead to serious damage to the retina.

Each type of uveitis is also classified by the frequency at which it occurs. Uveitis can be:

• Acute: Quick to develop and will improve within three months.
• Recurrent: Repeated episodes separated by a number of months.
• Chronic: Episodes last for a significant period and inflammation returns within three months of treatment.

Symptoms of uveitis

Symptoms of uveitis, which may affect one or both eyes, can include:^[3]

• Blurred vision
• Floaters (dark, hovering spots in vision)
• Pain in the eyes
• Redness of the eyes
• Light sensitivity (photophobia)

If any symptoms are being experienced or uveitis is suspected, medical attention from a doctor, optician, or ophthalmologist (eye specialist) should be sought with urgency.

Signs and symptoms of uveitis differ depending on what type of the condition is being experienced:

• Anterior uveitis is typically associated with pain, blurred vision, light sensitivity and redness.
• Intermediate uveitis is typically associated with floaters and blurred vision, while pain and also eye redness are uncommon.
• Posterior uveitis is typically associated with blurred vision and in some cases a loss of vision, pain is most likely absent and the eye most likely won’t be reddened.

Causes of uveitis

There are three main causes of uveitis:[^1]

• An autoimmune disorder or inflammatory disease
• Infection
• Physical trauma or injury to the eye, including eye surgery

Often, no specific cause of uveitis can be identified.

Autoimmune disorder or inflammatory disease

Autoimmune disorders, such as rheumatoid arthritis and Behcet’s disease have been linked to uveitis. An autoimmune disorder is characterized by the body’s immune system producing antibodies to attack its own tissues, with the result, in the case of uveitis, of causing inflammation. The exact reason why the immune systems of some people behave this way is unknown.

It is also believed that individuals with inflammatory diseases such as ankylosing spondylitis, reactive arthritis, sarcoidosis, and inflammatory bowel diseases, e.g. ulcerative colitis or Crohn’s disease, are more likely to develop uveitis.

Infection

Bacterial, fungal, or viral infection can cause uveitis in some cases. Possible infection types include toxoplasmosis, herpes simplex, herpes zoster, cytomegalovirus, gonorrhea, tuberculosis and Lyme disease.

Injury

If the eye suffers an injury, this can also lead to uveitis.

Diagnosing uveitis

The first stage of diagnosing uveitis will normally involve a doctor’s examination. If symptoms of the condition are present and uveitis is suspected, a doctor may then refer the individual to an eye specialist, an ophthalmologist, for further examination and confirmation of the diagnosis.

Specialists will typically test the individual’s vision, allowing them to see how the condition may be affecting it and assess any differences between each eye. Both eyes will also be examined using a microscope, usually, an instrument called a slit-lamp, enabling the doctor to look for signs of inflammation.[^1]

Laboratory tests may also be required to rule out infection and any other condition that may be causing the symptoms.^[3]

Uveitis treatment

Treatment for uveitis is aimed at reducing pain and inflammation, repairing any loss of vision, and attempting to treat any underlying causes. The chosen treatment route will depend upon the specific type of the condition being experienced and what is causing it.

In most cases, medication will be the primary treatment method, but in some cases, surgery may also be required.

Treatment will usually include:^[4]

Steroid medications

The use of steroid medications (glucocorticoids, hormones based on cholesterol) is common in the treatment of uveitis. Steroids can be administered in different ways, with the chosen method depending on what type of condition is being experienced.

• Steroid eye-drops: Typically used in the initial treatment of anterior uveitis when it is not caused by an infection. The severity of the condition will decide the prescribed dose and how often the drops should be administered. It is important to continue using the eye drops even after symptoms have disappeared to prevent recurrence.
• Steroid injections: Typically used in cases of intermediate or posterior uveitis or if steroid eye drops have proven unsuccessful. The injection is administered to the outside of the eyeball (periocular). A doctor will administer the injection using local anesthetic to minimize any pain or discomfort as much as possible. Generally, only one injection will be needed when the symptoms are at their worst.
• Steroid tablets: The strongest form of steroid medication, usually administered if other options have not worked. Side-effects can be severe, so steroid tablets will generally only be used if there is a risk of permanent damage to the eyes. It is important to continue using the tablets as prescribed even after symptoms have disappeared to prevent recurrence. The severity of the condition will determine how long an individual’s steroid tablet course will have to last, which could be anywhere between a number of weeks and, in much rarer cases, up to a number of years.

Mydriatic eye drops

Mydriatic eye drops may be prescribed in cases of anterior uveitis, in addition to steroid eye drops. This type of medication relaxes the muscles in the eye and thereby widens the pupil of the eye, helping to relieve pain and reduce the risk of glaucoma. They can, however, lead to a temporary blurring of vision.

Treating infection

If uveitis is being caused by an infection, this may be treated using either antibiotics, antiviral medication, or antifungal medication. If the condition does not improve after using these medications, immunosuppressants may be prescribed.

Immunosuppressants work by suppressing immune system responses, thereby disrupting the process of inflammation. There is, however, a risk of side effects. These may include:

• Skin rash
• Numbness
• Loss of appetite
• Nausea
• High blood pressure
• Headaches
• Breathlessness

People concerned about possible side effects should consult a doctor.

Surgery

In rare cases, surgery may be required to treat uveitis. This will typically be the case if the condition recurs frequently or if it is particularly severe.

The surgical procedure used to treat uveitis is called a vitrectomy. During the procedure, the substance that fills the interior of the eye, the vitreous, is removed and temporarily replaced with air, gas, or a liquid substitute. Eventually, the eye will naturally replace the substance by itself.^[5]

A vitrectomy can be carried out using either local or general (patient is asleep during the procedure) anesthetic and – like any surgical procedure – comes with some risk of complications.

Immunotherapy

In cases where other medical treatment options have been ineffective, a relatively new form of treatment called immunotherapy or biologic therapy may be prescribed. This involves the use of medications containing biological agents, i.e.natural antibodies, which can specifically target the eye area, treating the pain and inflammation associated with uveitis.

The types of biological medication most commonly used to treat uveitis are called infliximab and adalimumab. Biologic medications have the potential to improve an affected person’s quality of life. However, no long-term safety data has been collected about this form of treatment yet. Immunotherapy should therefore only be undertaken accompanied by close supervision from an experienced doctor.

Uveitis complications

If treatment for uveitis is not received quickly enough, complications can occur. Complications are more likely to occur in:

• People over 60
• People with chronic uveitis
• People with intermediate,posterior uveitis or panuveitis

Some of the most common uveitis complications include:

• Glaucoma: Inflammation can cause pressure to be put on the eyes, leading to glaucoma. If left untreated, this can lead to a loss of vision.
• Cataracts: A clouding of the eye’s lens, which can be caused by inflammation or steroidal treatment methods. If left untreated, this can lead to a loss of vision.
• Detached retina: When the retina begins to pull away from the eye due to inflammation. This can lead to serious vision problems.
• Cystoid macular oedema: Involving a buildup of fluid in the rear of the eye, leading to retinal swelling. This can lead to blurred vision.
• Posterior synechiae: When the iris sticks to the lens of the eye. It is most likely if treatment for uveitis is delayed.

People experiencing possible uveitis complications should consult a doctor.

Uveitis FAQs

Q: What is the prognosis for a person with uveitis?
A: With early and appropriate treatment, most cases of uveitis can be managed effectively. However, all types of uveitis can become chronic and recur frequently. If this is the case, individuals may be given eye drops in advance, allowing them to use them as soon as symptoms begin to occur. Uveitis caused by an infection tends to disappear once the infection has been properly treated, and does not recur.[^1]

Other names for uveitis

• Chorioretinitis (a of posterior uveitis)
• Iritis (a form of anterior uveitis)

[1]^[4][5][10]: Patient. “Uveitis.” July 21, 2016. Accessed December 1, 2017.

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1. NHS Choices. “Uveitis.” February 7, 2017. Accessed December 1, 2017. ↩

2. RNIB. “Uveitis.” Accessed December 1, 2017. ↩

3. National Eye Institute. “Facts About Uveitis.” August, 2011. Accessed December 1, 2017. ↩ ↩

4. NHS Choices. “Uveitis – Treatment.” February 7, 2017. Accessed December 4, 2017. ↩ ↩

5. American Uveitis Society. “Vitrectomy in Uveitis.” 2003. Accessed December 4, 2017. ↩ ↩

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**What is Uveitis?**



Uveitis is a general term that refers to inflammation⁢ within the middle layer (uvea)​ of the eye. The uvea consists of three parts:



**The iris:** The colored part​ of the eye that controls the pupil size

**The​ ciliary body:** Secretes fluid‍ into the eye ⁣and helps adjust the shape of the lens

**The choroid:** Provides nutrients to the outer layers of the retina



**Causes of ⁤Uveitis**



The exact ‍cause of​ uveitis is often unknown, but the condition can be associated with various factors, including:



– **Infections:** Bacterial,⁣ viral, or fungal infections can trigger uveitis

– **Autoimmune disorders:** Conditions like ‌rheumatoid arthritis, lupus, or Crohn’s disease can ⁢cause the immune system ⁤to attack the eye

-⁣ **Eye injuries:** Trauma or surgery to the eye can sometimes⁣ lead to uveitis

– **Other‌ medical conditions:** Cancers, HIV, or certain medications may be linked to uveitis



**Symptoms of Uveitis**



Uveitis can cause a ⁢wide range of‍ symptoms, including:



– Blurred vision

– Floaters

– Eye pain

– Redness

– ⁤Light ⁤sensitivity ⁣(photophobia)

-⁢ Tearing



**Types of Uveitis**



Uveitis can be classified based on‌ the affected ‍part of the uvea:



– **Anterior ⁣uveitis (iritis):**⁣ Inflammation primarily affects the iris

– **Intermediate uveitis (cyclitis):** Inflammation primarily affects the ciliary body

– **Posterior uveitis (choroiditis):** Inflammation primarily affects the choroid

– **Panuveitis:** Inflammation affects all three ⁤parts of the uvea



**Diagnosis and Treatment**



The diagnosis of uveitis requires a thorough eye examination,‌ including ‌a dilated pupil exam to visualize the back of the eye. Additional tests like bloodwork or imaging ​scans may be necessary to identify the underlying cause.



Treatment options for uveitis vary depending on the severity and underlying cause. Common ​treatments include:



– Eye drops (steroids, antibiotics, or antiviral medications)

– ‌Oral medications ⁣(steroids or immunosuppressive⁤ drugs)

– Injections​ (corticosteroids ⁤or biologics)

– Surgery (in severe ‍cases)



**Prevention**



Preventing uveitis is not always possible, but‌ certain ‍measures can reduce the risk:



– Treat infections promptly

– Manage autoimmune disorders effectively

– Wear ⁣protective eyewear during eye-hazardous⁤ activities

– Avoid contact with eye irritants



**Additional Information**



– ​Uveitis can be a serious⁣ condition, especially⁤ if left untreated.

– Early diagnosis and treatment are ⁢essential to prevent potential‌ complications like vision ‍loss or glaucoma.

– Regular ⁤eye exams are recommended for individuals with uveitis to monitor eye health and adjust treatment plans accordingly.