Hi, I'm Dr. Steven Hausman of Hausman Technology Keynotes. And I will be speaking with you about the different types of prosthetics that are available. A prosthesis is simply an artificial device that replaces a missing or diseased part of the body. External prosthesis include arms, hands, feet and legs. Internal prosthesis include knees, wrists or even eyes. Historically, prosthetics were designed simply to mimic the appearance of the missing body part and were generally not functional. A prosthetic hand will look like a hand, but could move or function. A prosthetic eye was often made of glass that would painted to look like an eye, but could of course not restore any vision. Today's prosthetics however are very different. There are many different models of feet that are designed for specific tasks like walking, running, swimming or skiing. They're customized for the wearer's age, weight, size and activity level. Prosthesis are more and more beginning to incorporate computers and motors. So that they can closely mimic and duplicate the function of the original limb. The federal government's Food and Drug Administration has also recently approved the first bionic eye. This is a prosthetic that can restore a small amount of vision in people who are previously blind. And is a type of neuro-prosthesis. Researchers are working towards the goal of attaching the prosthetic directly to the skeletal system and integrating it with the nervous system. So that it functions without conscious thought on the part of the wearer.