Infectious keratitis

Eye pain/redness, blurred vision & photophobia are features of all infectious keratitis.

Bacteria (eg, Staphylococcus aureus, Pseudomonas):
Risk factors: Improper contact lens use; Corneal trauma, foreign body
Central, round ulcer
Stromal abscess
Mucopurulent discharge
Acute presentation

Herpes simplex virus:
Risk factors: Immunocompromised, HIV
Branched dendritic ulcerations
↓ Corneal sensation
Watery discharge
Recurrent episodes

Fungi (eg, Candida):
Risk factors: Immunocompromised with corneal injury involving contaminated soil (eg, gardening)
Ulcerations with feathery margins & satellite lesions
Mucopurulent discharge
Indolent course