Ophthalmia nodosa Due to Caterpillar Hairs

Ophthalmia nodosa  is a rare disease caused by reaction to the hairs of an insect commonly called a caterpillar. It is a cutaneous condition and  characterized by inflammation of the eye due to lodging of (for example) caterpillar hairs in the conjunctiva, cornea, or iris.Caterpillar setae (caterpillar hairs) are a well recognised, although uncommon cause of ocular trauma. Following the entry of caterpillar setae into the eye, diverse ocular lesions occur. These include catarrhal conjunctivitis, keratoconjunctivitis, conjunctival nodules, keratitis, iridocyclitis, iris nodules, vitritis, papillitis, or chorioretinopathy. This can occur due to the mechanical effect of the setae and their penetration or a direct toxic effect. Rarely, the damage is severe enough to require enucleation

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