Strabismus Essay -- Biology Essays Research Papers

StrabismusA camera lens focuses patterns of sprightly onto film which records the token exactly. If the lens is out of focus or partly covered, a b lurry or obscured picture forget result. The film is a recording device, it does non interpret and select what it portrays. Images from a camera be objective in a very literal sense. Seeing, however, is not such(prenominal) a seamless process. Our eyes work similarly to a camera in that they have a lens which focuses a real characterisation on our retina, a light sensitive sheet of cells. This retinal mountain range is a portrayal of the world as it truly is. The image which we see, however, is not this image. By considering a normal vis ual property as hearty as an uncommon ocular disorder the process of formulating our visual sense will be investigated. There is a difference between the picture put down on film and that recorded by our drumheads. For purposes of this paper, the term retina l image is used as an analogy to a photographic image (one without rendition by the brain). The phrase brain image refers to the retinal image post-brain interpretation. The brain image is the image which would be described by the person, the imag e which is idea of as seeing. This phenomena of brain interpretation is easily demonstrated by discovering ones contrivance get laid. (A good self experiment is described at 1) The blind plot results from an area of the retina which does n ot have photoreceptor nerve cells, the optic nerve head. Yet, crimson without this seemingly vital information, the brain is able to supply us with a complete brain image. The brain has filled in the blind spot with an image which it believes makes sense. Ha ving explored the blind spot, one shadow understand that what is captured in the brain image m... ...have been issued is forced to develop. Adult onset strabismus, however, results in double vision because the brain can not simply ignore the one image that does not make sense. This type of strabismus can not be treated with patching, as their brains have already real a patte rn which uses both eyes to comprise the brain image. (4) (5) This geographic expedition of strabismus has shown that the brain is a very active participant in determining our perception of the world around us. Visual informati on authentic by the eye is only part of the story, the brain takes these images and selects what is useful, discarding (strabismus) as well as adding (blind spot) information, thus, constructing our visual experience. Internet Sourceshttp//serendip.brynmawr.edu/bb/blindspot1.htmlhttp//www.hhmi.org/senses/b410.htmlhttp//www.seekwellness.com/index.htm