I have migraines fairly often and had a similar experience during a job interview. It was bizarre and troubling because at first I thought it was a floater, the

I have migraines fairly often and had a similar experience during a job interview. It was bizarre and troubling because at first I thought it was a floater, then I realized it was in the same place in both eyes! It grew over the course of a few minutes until it completely surrounded my visual field, then it faded away.