Cornea
Acanthamoeba Keratitis
Also known as: Acanthamoeba keratitis, AK, contact lens keratitis severe, ring infiltrate keratitis, radial keratoneuritis, amoebic keratitis, contact lens swimming infection, tap water contact lens
Clinical decision support only
Overview
A rare but devastating corneal infection caused by the free-living amoeba Acanthamoeba. Almost exclusively associated with contact lens wear and exposure to contaminated water (tap water, swimming, hot tubs). Presents with severe pain disproportionate to the clinical signs. Radial keratoneuritis is pathognomonic. Diagnosis is often delayed because it mimics HSV keratitis. Outcomes are poor without early specialist treatment.
What OptoGuide™ covers for acanthamoeba keratitis
- Recognition patterns — symptoms, signs, and differentiators
- Don't-miss risks and escalation triggers
- Management tiers with linked Australian therapeutics
- Referral urgency, specialty, and letter drafting
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