When I was in 8th grade, I got a new backpack for school. But it had these pieces of material on the zippers that I didn't like. I used an icepick to remove them since they were knotted. I slipped with the icepick, and accidentally hit myself in the right eye with the tip. There was a 1/4" cut in the white part of my eye right below the retina. Had to be sedated and get stiches on my eyeball. It resulted in me becoming right eye dominant. Fortunately it was my shooting eye.
Since it pierced multiple layers surrounding my eyeball, it messed up the pressure in my eye and eventually gave me glaucoma. Along with a bunch of squiggly material over my right eye lens that looks like little worms swimming around when I move my eye. Distracting at times, but the brain does a good job of erasing stuff from your vision that you don't need. Sometimes I will purposely close my right eye for a few hours just to make my lazy ass left eye work harder...
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