A 19-year-old man presented to our ophthalmology clinic with a mass in his right eye that had been present since birth but had gradually increased in size. He did not have pain, but the mass caused vision defects, mild discomfort on blinking, and the intermittent sensation of the presence of a foreign body. Physical examination revealed a white, ovoid mass, 5 mm by 6 mm, that straddled the inferotemporal limbus (Panel A), with several black hairs (Panel B).

Experts have examined the nest, which is said to be 21'9” in length, and say the common type of wasp found in gardens would never normally build a nest of this size.

They believe it must be an invasive species of wasp which had migrated from Africa.

The Canary Islands are less than 100 kilometres from Morocco by water.