| Cause | Picture/Description | Prominent Sx | Hyperemia and/or edema of palpebral conjunctivia | D/C | Ciliary Flush | Pupils | Ant. Chamber Depth | Other |
| Conjunctivitis - Inflammation of the conjunctiva |  |
Irritation, itching | + |
Watery, mucoid or purulent | - |
NL |
Deep (NL) | See other table for differential of conjunctivitis |
| Scleritis - Localized, raised hyperemic lesion. More serious then episcleritis |
 |
Severe, "boring" pain | - |
- |
- |
NL |
Deep (NL) | Often assoc'd w/ underlying systemic illness. On exam, sectoral or diffuse hyperemia of episcleral vessels |
| Iritis |  |
Pain, photophobia, burry vision | - |
- |
+ |
May be irregular |
Deep (NL) | May follow blunt ocular trauma or be associated with underlying systemic illness. |
| Angle Closure Glaucoma |
 |
Pain, HA, nausea, visual "halos" | - |
- |
+ |
Fixed and mid-dilated |
Narrow in affected eye, shallow in other eye | Globe feels hard on palpation (due to ( IOP). |
| Keratitis: eg herpes simplex keratitis |
 |
Pain, blurry vision | - |
- |
May be present |
NL |
Deep (NL) | Often h/o contact lens use. |
| Foreign Body | Pain, foreign body sensation | - |
- |
May be present |
NL |
Deep (NL) | H/o grinding, outdoor activity, etc. | |
| Lacrimal Problems | Pain in lacrimal area | - |
Purulent from punctal region |
- |
NL |
Deep (NL) | Tenderness over lacrimal sac and punctum. |