For example, Twenty years ago, doctors relied on conjectures to determine the causes of heart attacks. But now, they use chemicals, nuclear imaging devices and databases they diagnose heart attacks with great accuracy and treat them with tremendous success. .

             Telemedicine is a novel idea that can play a great part in diagnosis. In telemedicine, arrangements are made to see patients via video or computers links. When a specialist sees a patient through computer links, the specialist can provide diagnosis for the disease and help to obtain a proper treatment. .

             Computers are also being used to produce patterns to help physicians diagnose problems of the brain. Research has revealed that a certain pattern of stripes can be painful to look at for some people. "The pattern resembles a circle filled with alternating black-and -white vertical stripes. At a viewing distance of forty-three centimeters, this grating has a spatial frequency of three cycles/degree of visual arc and a Michelson contrast of about 0.7." .

             The Role of Computers in Treatment.

             As mentioned earlier, computers are used in medical treatments as well. Computer aided surgery known, as CAS can be a well-known example. Initially, CAS meant a technology of surgical simulation using three-dimensional organ models reconstructed by medical imaging using a computer graphics technique. There is a notion among the public that CAS completely replaces surgeons' hands with robots. This is not the purpose of CAS. Invention in CAS is always to support surgeons but not replace them. Decision-making is the most important process in surgery. Only the surgeons should make decisions regarding a surgery.

             CAS can provide a lot of new styles of surgery that we have never imagined. Endoscopic surgery is good example. Modern surgery is to remove or replace legions, but rapid progress in laser surgery or radiological treatment may make it unnecessary in the future.