I am happy to see these posts and wanted to add my experience. I had about 10 auras per year w/o pain (scintillating scotomas) for 22 years. They last exactly 20 minutes. A neurologist and my primary care physician weren't concerned. I had mitral valve repair surgery (minimally invasive) in October 2018. After the surgery I had 28 up to 12/2018. Then I had 61 in 2019 and so far I've had 26 since the beginning of the year. Fluorescent lights, sunlight, electronic devices seem to be the triggers. I have journaled the foods I am eating, given up foods, vitamins, herbs and medication but no connection. My doctors don't seem concerned. I've seen a couple of neurologists, been told to drink more water, take magnesium, CoQ10 and B2. No results. Interesting to see all the posts online and yet my surgeon and cardiologist aren't familiar with this.