Iritis

Read about the possible causes of uveitis. It often occurs in people with autoimmune conditions such as ankylosing spondylitis, reactive arthritis and Crohn's disease.

Uveitis occurs when the eye becomes inflamed (red and swollen).

Inflammation is the body's response to illness or infection.

Most cases of uveitis are linked to a problem with the immune system (the body's defence against infection and illness).

Rarely, uveitis may occur without the eye becoming red or swollen.

Immune system problems

Uveitis often occurs in people who have an underlying autoimmune condition (where the immune system mistakenly attacks healthy tissue).

Autoimmune conditions known to cause uveitis include:

Infection

Uveitis can also be caused by an infection, such as:

  • toxoplasmosis – an infection caused by a parasite
  • herpes simplex virus – the virus responsible for cold sores
  • varicella-zoster virus – the virus that causes chickenpox and shingles
  • cytomegalovirus – a common infection that doesn't usually cause any noticeable symptoms, but can cause sight-threatening uveitis in people with a lowered immune system
  • tuberculosis 
  • HIV and syphilis are rare causes

Other causes

Uveitis can also be caused by:

  • trauma or injury to the eyes, or eye surgery
  • some types of cancers, such as lymphoma, although this is a very rare cause of uveitis

Sometimes, a specific cause of uveitis can't be identified.

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Your Neighbourhood Professionals. Just a Click Away! Sky Mitchell Counsellor Natasha Mazzoni  Counselling & Therapy B W Consultancy
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