I cracked my cornea from an impact of a rotary tools blade disintegrating. Filled the inside of my pupil with blood. Was almost blinded permanently by the pressure of the blood pushing on my optic nerve. My eye was white but my pupil was red. I was forced on bedrest for three weeks as moving my eye could repopen the bleeding and I'd have to go into surgery. Thankfully it never broke again. There are safety glasses everywhere in my house now.