John Fothergill’s description of a headache he suffered in the winter of 1778 is thought to be the first anglophone account of a #migraine’s ocular disturbances.

He saw “a singular kind of glimmering in the sight; objects change their apparent position surrounded by luminous angles, like those of a fortification.
Giddiness comes on, headache, and sickness”.

Fothergill was detailing, with the architectural language of fortification, what has been subsequently named #scintillating #scotomata: serrated hallucinations in the shape of the letter “C”, which resemble the angular walls of a bastion.
https://publicdomainreview.org/collection/visualizing-migraines/