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ContentsSynopsisCodesLook ForDiagnostic PearlsDifferential Diagnosis & PitfallsBest TestsManagement PearlsTherapyDrug Reaction DataReferencesView all Images (14)
Emergency: requires immediate attention
Uveitis - External and Internal Eye
Other Resources UpToDate PubMed
Emergency: requires immediate attention

Uveitis - External and Internal Eye

Print Images (14)
Contributors: D. Chimene Richa MD, Deepak Sobti MD, Rachel Ellis MD
Other Resources UpToDate PubMed


Uveitis is intraocular inflammation that involves the uvea of the eye. The uvea consists of the pigmented vascular structures of the eye, including the iris, ciliary body, pars plana, and choroid. Uveitis can result from a variety of different etiologies including trauma, surgery, viral and bacterial infections, and autoimmune disease. Uveitis is typically classified based on the parts of the uvea involved: anterior uveitis; intermediate uveitis; posterior uveitis; and panuveitis, in which all parts of the uvea are involved. Anterior uveitis is the type most commonly seen in the emergency room and primary care settings.

Anterior uveitis is intraocular inflammation confined to the anterior chamber of the eye, namely the iris and ciliary body. It can be either acute or chronic and have infectious or noninfectious etiologies. It has a wide range of presentations from a white and quiet eye with inflammation only noted on examination with high magnification, to a painful red eye with moderate to severe inflammation, light sensitivity (photophobia), and decreased vision.

Typical symptoms include:
  • Redness
  • Pain
  • Photophobia
  • Epiphora
  • Visual disturbances / blurry vision
Typical signs include:
  • Red eye
  • Cells and/or flare in anterior chamber
  • Keratic precipitates on inner aspect of cornea
  • Iris nodules
  • Hypopyon (severe uveitis)
Patients with anterior uveitis will often prefer the lights off in the exam room due to severe photophobia. Checking the visual acuity is very important, as the inflammation and excessive tearing may cause reduced vision.

The cause of anterior uveitis is most often idiopathic. However, it can be seen in the setting of recent trauma (also referred to as traumatic iritis) or have autoimmune / noninfectious etiologies as well as infectious causes. Approximately one-half of patients with acute anterior uveitis are HLA-B27 positive. Systemic diseases with this association include ankylosing spondylitis, Reiter syndrome, psoriasis, inflammatory bowel disease, sarcoidosis, and tubulointerstitial nephritis and uveitis syndrome (TINU). Infectious causes include syphilis, tuberculosis, Lyme disease, herpes simplex and herpes zoster, toxoplasmosis, and histoplasmosis.

Certain systemic medications, such as rifabutin, bisphosphonates, sulfonamides, diethylcarbamazine, oral contraceptives, and etanercept have been reported to cause anterior uveitis. Neoplastic masquerade syndromes, such as primary central nervous system lymphoma, can present with a nonimmune mediated uveitis.

Overall, idiopathic causes are more frequently the cause of anterior uveitis, whereas posterior uveitis is more often caused by infectious etiologies.

Intermediate uveitis involves inflammation of the ciliary body and pars plana and manifests mainly as floaters in an otherwise quiet eye. Vision loss is often from macular edema or cataracts secondary to the chronic inflammation. A fundus exam reveals vitreous cells, "snowballs," and "snowbanking" (accumulations of inflammatory cells inside the eye). This type of uveitis is associated with multiple sclerosis, sarcoidosis, Lyme disease, toxocariasis, syphilis, tuberculosis, and human T-lymphotrophic virus 1 infection.

Posterior uveitis is inflammation involving mainly the retina and choroid, and inflammatory cells are noted mainly in the vitreous. Causes of this include systemic lupus erythematosus, polyarteritis nodosa, granulomatosis with polyangiitis, and other "white dot" syndromes.


H20.9 – Unspecified iridocyclitis

128473001 – Uveitis

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

The differential diagnosis of uveitis is broad and includes any process that causes intraocular inflammation. This includes the following:
Masquerade syndromes:
  • Primary central nervous system lymphoma – Suspect in elderly patient with new onset anterior uveitis.
  • Juvenile xanthogranuloma – Usually presents before age 1, and patients have reddish-yellow characteristic skin lesions.
  • Retinitis pigmentosa – Patients also have night blindness.
  • Ocular ischemic syndrome – Typically males aged >65 with cardiac risk factors; Doppler ultrasound can show >90% stenosis.

Best Tests

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Management Pearls

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Drug Reaction Data

Below is a list of drugs with literature evidence indicating an adverse association with this diagnosis. The list is continually updated through ongoing research and new medication approvals. Click on Citations to sort by number of citations or click on Medication to sort the medications alphabetically.

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Last Updated: 11/18/2016
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Emergency: requires immediate attention
Uveitis - External and Internal Eye
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Uveitis : Eye pain, Blurred vision, Photophobia, Floaters, Conjunctival injection
Clinical image of Uveitis
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