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.
X-radiation is also called Roentgen radiation often, after its discoverer. He named it X-radiation to signify an unknown type of radiation, and the name stuck throughout the years.What is interesting is the fact that Wilhelm Conrad Roentgen discovered the X-ray by accident in 1895.During his experiments with with the cathode ray generator, he noticed that beam that the machine sent out was penetrating and reaching deeper layers than he though was possible.-radiation is also called Roentgen radiation often, after its discoverer. He named it X-radiation to signify an unknown type of radiation, and the name stuck throughout the years.