| Infection |
| Campylobacter jejuni enteritis |
| Cellulitis |
| Chickenpox |
| Choroiditis |
| Diphtheria |
| Herpes simplex virus |
| Herpes zoster virus |
| HTLV-II |
| Influenza |
| Measles |
| Parvovirus B19 |
| Pertussis |
| Scarlet fever |
| Sinusitis |
| Syphilis |
| Varicella virus |
| Viral hepatitis |
| Inflammation |
| Giant cell arteritis |
| Iritis or uveitis causing damage to ciliary ganglion |
| Rheumatoid arthritis |
| Sarcoidosis |
| Vogt-Koyanagi-Harada syndrome |
