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.
Best Answer: It is just an abbreviation. The term is xerography. The first x-ray was discovered by Wilheim Roentgen. The procedure was then called roentgenology.-ray, is actually describing the ray used, which is X or roentgen ray, named X by the man who discovered it. He called it X because it was unkown. It is a wave of photons. Check out the research -- it is interesting.