Abnormalities (hemorrhages etc.) conjunctiva-causes

1.Subconjunctival hemorrhages-- common in trauma, rare in SAH and severe HTN
2. Leptospirosis-- injection of conjunctiva plus meningitis and myopathy
3. Filarial migratory phase of loa-loa-- injection is seen
4. telangiectasia in conjunctiva seen in sickle cell disease and ataxia telangiectasia
5. Retroorbital tumors can produce injection
6. Renal failure can produce severe conjunctival injection