I remember several years ago, there was a concern about microwave popcorn causing eye problems and possible blindness. I couldn't make the connection. I had heard it was from the steam when you opened the popped corn......so I assumed it was like a burn on the tender tissure of the eye, from the steam. I thought it was a bunch of bunk, until I had started to develop a cloudy vision problem. It was like looking through a heavy plastic bag.
As it turned out, it was from one of the ingredients in the popping oil. They corrected that problem.....and now this.