It's not smart nor clever, but as a child I used to stare at the sun wide-eyed until my eyeballs teared up beyond my ability to keep them open any longer — easi

It's not smart nor clever, but as a child I used to stare at the sun wide-eyed until my eyeballs teared up beyond my ability to keep them open any longer — easily thirty seconds and more. My memory was of the sun itself distinctly resolving itself into a perfect circle with a sort of contrasting peripheral shadow that I recall describing as being 'like an aspirin pill'. I blame some 80s TV show where an astronaut gained superhuman powers of some sort after staring directly at the sun. I've always been curious to know what, if any, affect this has had on my vision (I don't have a terribly good capacity for resolving contrast during twilight).