- Assoc w/autoimmune dz→ sarcoid, behcet's dz
- Malignancy→ lymphoma
- Infxn→ toxo, CMV, brucellosis, HSV, VZV, secondary syphillis, TB
- Often idiopathic
- Decreased acuity
- May not have external inflammatory findings unless pan-uveitis
- Other findings assoc w/underlying dz