36m - had a very bizarre visual artifact in my right eye. Never experienced anything like it.

I wear glasses and occasionally contacts with a pretty strong astigmatism. Today while I was watching TV, I very suddenly had a large circular artifact appear in my right eye, where the entire center of my vision was blurred/warped, with hazy light rays extending out in a circle around it. My left eye was completely fine but this weird artifact took up the entire center of vision in my right eye.

There was no irritation at all, it just suddenly appeared. I removed my glasses, blinked hard several times and after about 30 seconds it disappeared instantly. Didn’t fade away or anything, was just instantly gone.

I would think that something just got in my eye but there was no irritation at all. What could it have been?