It was triggered off by an allergic reaction to Benzalkonium Chloride
which is a preservative and disinfectant. It's in
the anesthesia for eye exams and I had my first reaction to it in January. During that time, my hypothyroidism was going up and down, and never stable. That was the added component which diagnosed the condition.
I am so sensitive to this ingredient that my eyes turn bright red, burn and itch.