Etiology/risk factors:

• Majority of cases are idiopathic
• Often associated with non-infectious systemic conditions:
  • Rheumatoid arthritis
  • SLE, sarcoidosis
  • Seronegative spondyloarthropathies
  • HLA B27 syndromes: crohn, ulcerative colitis, ankylosing spondylitis, psoriatic arthritis, juvenile idiopathic arthritis, reactive arthritis
  • Behcet disease
• Infectious causes: HSV, VZV

Clinical Features:

• Dull progressive periocular pain
• Red eye
• Photophobia
• Blurry vision
• Increased lacrimation
• Circumcorneal injection (hypopyon)