Description
Caterpillars, tarantulas and vegetation produce a variety of defence fibres (called setae) uniquely adapted to penetrate the tissues of their target.1 Ophthalmia nodosa (ON) is an ocular inflammatory reaction resulting from these setae entering the eye. Microscopic barbs on the surface of setae facilitate their entry into the cornea with subsequent migration to underlying structures leading to potentially sight-threatening conditions such as vitritis and endophthalmitis.2
A 41-year-old man presented to Manchester Royal Eye Hospital with a 6-day history of unilateral left-sided red eye and pain secondary to a caterpillar falling into his eye while on an adventure holiday (figure 1). Prior to presenting in the UK, he had sought initial medical attention in the USA, where multiple foreign bodies were noted. He was treated with chloramphenicol eye ointment, and no follow-up was arranged.
Figure 1
Acute red eye and...
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