Strabismus
A camera lens focuses patterns of light onto film which records the image exactly. If the lens is out of focus or partially covered, a b lurry or obscured picture will result. The film is a recording device, it does not interpret and select what it portrays. Images from a camera are objective in a very literal sense. Seeing, however, is not such a seamless process. Our eyes work similarly to a camera in that they have a lens which focuses a real image on our retina, a light sensitive sheet of cells. This retinal image 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 well as an uncommon ocular disorder the process of formulating our visual sense will be investigated. There is a difference between the picture recorded on film and that recorded by our brains. For purposes of this paper, the term "retina l image" is used as an analogy to a photographic image (one without interpretation 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 thought of as seeing.
This phenomena of brain interpretation is easily demonstrated by discovering one's blind spot. (A good self experiment is described at 1) The blind spot results from an area of the retina which does n ot have photoreceptor nerve cells, the optic nerve head. Yet, even 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 can understand that what is captured in the brain image m...
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...have been ignored 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 developed a patte rn which uses both eyes to comprise the brain image. (4) (5)
This exploration of strabismus has shown that the brain is a very active participant in determining our perception of the world around us. Visual informati on received 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 Sources:
http://serendip.brynmawr.edu/bb/blindspot1.html
http://www.hhmi.org/senses/b410.html
http://www.seekwellness.com/index.htm
Marr, D. (1976). Early processing of visual information. Philosophical Transactions of the Royal Society London Ser. B, 275, 483-524.
Picture this: you're having a nice weekend at the lake with your family, fishing, swimming, and having an all-around great time. But then you notice that your boat isn't running as well as it should, especially considering you just cleaned it and made sure everything was in perfect condition before leaving your house. Puzzled, you take your boat out of the water to notice that the hull and motor is covered in tiny clam-like creatures, making your pristine white boat look like something that was just drug out of the bottom of the lake. What are these animals that ruined your weekend of fun? They are zebra mussels, and are found in lakes, rivers, and other bodies of freshwater across the U.S. Normally found in Eastern Europe, the first group of this invasive species hitched a ride in the ballast tanks of ocean liners in the 1980s, and quickly spread. Regulations are in place to stop the spread, but removing them from places that have already been infested is tricky. Today we will talk about the damages zebra mussels cause, how this problem is managed, and what you can do to help.
... sight: A case of hemineglect. In J. A. Ogden, Fractured Minds (pp. 113-136). New York: Oxford University Press.
Introduction Reagan, Ronald Wilson (1911- ),the 40th president of the United States (1981-1989), enforced the policies that reversed a general direction of movement toward greater government involvement in economic and social regulation. Reagan as the younger of two sons, was born in Tampico, Illinois and spent most of his childhood in Dixon, Illinois. After studying at Eureka College,a small Disciples of Christ college near Peoria, Illinois, he majored in economics, and became the president of the student body, a member of the football team, and captain of the swimming team. He had special drawings toward acting, but after the graduation in 1932 the only job available related to show business was as a local radio sportscaster. In 1936 he became a sportscaster for station WHO in Des Moines, Iowa. A year latter, Reagan went to Hollywood and began an acting career that spanned more than 25 years. He played in more than 50 films, including "Knute Rockne"-All American (1940), "King's Row" (1942), and "Bedtime for Bonzo" (1951). Early political career Reagan's first political activities were associated with his responsibilities as a union leader. As union president, Reagan tried to remove suspected Communists from the movie industry. When the U.S. House Committee. Began an investigation in 1947 on the influence of Communists in the film industry, Reagan took a strong anti-Communist stand testifying before the committee. Reagan emerged on the national political scene in 1964 when he made fervent television speech supports for the Republican presidential candidate, United States Senator Barry Goldwater from Arizona. Although the election was lost, Reagan's speech brought in money and admiration from Republicans around the country. After the speech a group of Republicans in California persuaded Reagan to run for governor of California in 1966. Reagan appealed to traditional Republican voters. He defeated Edmund G. (Pat) Brown, Sr., Democrat, by almost a million votes. The election of 1980 Reagan spent years making political friends at party fund-raising dinners around the country. In the election of 1980 for the president, the candidates were Carter and Reagan. The contrast between the television personalities of two candidates was very important to people. Carter’s nervous manner had never been popular to people, while Reagan’s charm and happy face was a call for return to patriotism, which appealed to the public. Many voters believed that Reagan was forceful leader who could get their lives in shape and who could restore prosperity at home.
Ronald Wilson Reagan played an extremely important role in United State history. Reagan did numerous things in his lifetime that affect United States citizens to this day. Ronald Reagan is often remembered as the 40th president of the United States, without being remembered for the important things he did to make this land that we love the way it is today. Reagan considered being a significant historical figure for many reasons. Ronald Reagan is a significant figure in history because he positively changed the country throughout his presidency, he worked to improve the country diligently through times of hardship, and he spoke for the citizens of the United States.
The high percentages of individuals who endure this impairment justifies and practically demands future research because the causes are not fully understood. The need for future research can be better emphasized if those with normal vision try to empathize with victims of macular degeneration. One can only imagine how frustrating it must be to receive sensatrions only in the periphery of the retina. Because the macula encompassed the cone rich fovea, which is used to focus on objects, the fovea degenerates as well. This occurence inables individuals to interpret the sensations they experience. Reading, ...
On January 20, 1981 President Reagan gave his inaugural address. In his address he first and foremost addressed the economic problems that America needed to face. He says, “Economic ills have come upon us over several decades. They will not go away in days, weeks, or months, but they will go away.” He goes on in saying “In the present crisis, government is not the solution to our problem; government is the problem.” His economic policy is often coined with the word Reaganomics. He devised a plan that would reduce the growth of government spending, reduce marginal tax rates on income from labor, reduce government oversight on the economy, and control the supply of money to reduce inflation.
Zoltan, B. Vision, Perception, & Cognition: A Manuel for the Evaluation and Treatment of the Neurologically Impaired Adult. Slack Incorporated: New Jersey, 1996. 109-111.
In “The Anatomy of Judgmen”t, M. L. J. Abercrombie discusses how information is gained through our perception. Abercrombie claims that interpretation is a very complicated task that people have been learning to exercise since birth. Each person has a different way of interpreting the objects or situations they see, because people often relate their own past experiences. She also explains two important concepts: schemata and context. She defines schemata as a way our mind functions by understanding new things perceived through sight, by relating it to an individual’s past experiences. Past experiences help interpret what is seen further, if the object fits one’s expectation or their schemata, and not something different from their past experiences. Her fundamental insight is that seeing is more complex than just passively registering what is seen, and consists of a form judgment for...
Some other causes of the infection include different sexual partners, and holding back the urge to urinate. Others such as renal stones and tumors are very seldom.
The human sense of sight is a very detailed and complex ability, which humans often take for granted. However, once they take time to think about it, they realize how complicated the process really is. The eye receives light from the outside with the cornea, which then travels through the nerves until the light reaches the brain. The brain processes this light into information about the outside world, and then the brain uses this information to decide how to respond. All this happens in less than half a second.(Robertson, 2012) The used information is then stored inside the brain for safekeeping in memories, though some images may still influence a person’s thoughts. The brain is the central hub for a person, used to give commands and store emotions felt, as well as many other uses. It is the most important organ in the body, and influences what the images sent from the eye are translated into.
Merleau-Ponty distinguishes three aspects of the psychological process; basic sensations, perception, and the associations of memory (Merleau-Ponty, 1994). Basic sensations receive raw information from the world and transduce them for our perceptual processes. Perception unifies the infinite amount of information about our environment, from our environment, into a meaningful structure. Perception is interpretive, but its presentation of the world is as distal and objective. There are three central features of perception for Merleau-Ponty. First, perception is synthesized independently by the body and not by the mind (consciousness).
The next one is Chlamydia it is the most common reported STI in the United Sates. (Greenberg, Bruess, & Oswalt, 2014) Believe it or not but it is caused by a intracellular parasite and symptoms very causing discomfort using the restroom and discharge. To diagnose chlamydia, a layer of cells is scraped from the infected area or a urine sample can be tested. (Greenberg, Bruess, & Oswalt, 2014)
There are many different Visual Perception principles in perception. The main principles are Gestalt. Gestalt is a German word meaning 'form' or 'shape'. Gestalt psychologists formulated a series of principles that describe how t...
Blakslee, S. (1993, August 31). The New York Times. Retrieved May 2, 2014, from www.nytimes.com: http://www.nytimes.com/1993/08/31/science/seeing-and-imagining-clues-to-the-workings-of-the-mind-s-eye.html