TIL: The pigment in the iris of your eye can rub off and break free. This is called Pigment Dispersion Syndrome. The pigment granules can then block fluid flow inside your eye, which can lead to increased eye pressure. For about 10-35% of those with the condition, it results in a form of glaucoma.

https://my.clevelandclinic.org/health/diseases/pigment-dispersion-syndrome…
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