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.
These x-ray experiments got him the first Nobel Peace Prize in Physics, and he was so influential that they named element 111, which is called roentgenium, after him. He died in Munich from a carcinoma of the intestine on February 10, 1923. Wilhelm was studying something different when he discovered the x-ray.