ABSTRACT
This is caused by the varicella zoster virus, which lies dormant in the trigeminal nerve ganglion following earlier chickenpox infection. Reactivation may be triggered by stress, cold or an immunocompromised situation (e.g. secondary to HIV infection). It is unusual in young children,but (as with older children and adults) may involve the cornea, causing keratitis and damage to other parts of the eye. Diagnosis is confirmed by direct fluorescence assay or PCR of vesicular fluid. Management includes ophthalmic consultation and treatment with oral aciclovir (or with intravenous aciclovir if the patient is immuncompromised or there is eye involvement).
