Visual Migraine

I had zigzags, an ocular migraine on my way to the library. And sure enough on the way home the headache started. I nipped it with a generic excedrin. It worked!

https://www.brighamandwomens.org/neurology/neuro-ophthalmology/visual-migraine

https://www.mayoclinic.org/diseases-conditions/migraine-with-aura/diagnosis-treatment/drc-20352077 

https://www.mayoclinic.org/diseases-conditions/migraine-headache/expert-answers/ocular-migraine/faq-20058113