Visual Prosthesis Essay

1108 Words5 Pages
Visual Prosthesis Savannah Niven Introduction Currently in this term, our class has been studying medical technology and bionics, with a focus on replacement prosthetics for humans. Each of us has chosen to apply our research and knowledge to an individual prosthesis that takes our interest. I have chosen the visual prosthesis, not to be confused with the ocular prosthesis; which is simply an implanted artificial eye with no benefit other than cosmetically. The visual prosthesis is a bionic eye, meaning its intended use is to restore as much functional sight as possible in the patient. Topic The visual prosthesis, although always technically feasible, has only recently become a reality due to our technological advances that have made it possible to make this developing dream a reality. The most common visual prosthesis is much like the cochlear ear implant, which is a small implant situated just behind the ear and under the skin, that picks up vibrations as sound, and sends these electrical impulses to the brain which can then be interpreted as voices, music, etc. The visual cortex implant instead interprets light from a sensor. Any blind person may have these procedures as long as their visual censors in the brain are not damaged. The case for many blind people is that their retina or optic nerves are not intact, thus requiring intervention at the brain level. There are three main types of visual prostheses, which determine where the stimulating electrodes need to be placed: The retinal implant is planted into the eye to stimulate the retina, the optic nerve implant is planted in the optic nerve, and the cortical implant has electrodes implanted in the visual cortex, which directly links to the brain. Figure one explains the positioning of each implant respectively and figure two shows the sizing of the wireless microelectrode array implant relative

More about Visual Prosthesis Essay

Open Document