An eye blister is a benign growth which can appear on the whites of the eyes or on the cornea itself. There are two main types of eye blister: pinguecula and pterygium.
Before x ray machines were invented, broken bones, tumors and the location of bullets were all diagnosed by physical examination and a doctor's best guess. Patients paid the price of these approaches. Then on November 8th of 1895, a German physics professor Wilhelm Conrad Roentgen made a remarkable discovery.
Where does the X in X-ray come from? Here's a piece of high-energy astrophysics trivia (you never know when you might need to know these things). Where does the X in X-ray come from? The answer is that a German physicist, Wilhelm Roentgen, discovered a new form of radiation in 1895. He called it X-radiation because he didnÃ¢â¬â¢t know what it was. Yes, itÃ¢â¬â¢s as simple as that.