- published: 19 Mar 2016
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Visual perception is the ability to interpret the surrounding environment by processing information that is contained in visible light. The resulting perception is also known as eyesight, sight, or vision (adjectival form: visual, optical, or ocular). The various physiological components involved in vision are referred to collectively as the visual system, and are the focus of much research in psychology, cognitive science, neuroscience, and molecular biology.
The visual system in humans and animals allows individuals to assimilate information from the environment. The act of seeing starts when the lens of the eye focuses an image of its surroundings onto a light-sensitive membrane in the back of the eye, called the retina. The retina is actually part of the brain that is isolated to serve as a transducer for the conversion of patterns of light into neuronal signals. The lens of the eye focuses light on the photoreceptive cells of the retina, which detect the photons of light and respond by producing neural impulses. These signals are processed in a hierarchical fashion by different parts of the brain, from the retina upstream to central ganglia in the brain.
Paul Davis Ryan (born January 29, 1970) is the U.S. Representative for Wisconsin's 1st congressional district, serving since 1999. He is a member of the Republican Party, and has been ranked among the party's most influential voices on economic policy.
Born and raised in Janesville, Wisconsin, Ryan graduated from Miami University in Ohio and later worked as a marketing consultant for Ryan Incorporated Central, run by a branch of his family. In the mid to late 1990s, he worked as an aide to United States Senator Bob Kasten, as legislative director for Senator Sam Brownback of Kansas, and as a speechwriter for former U.S. Representative and 1996 Republican vice presidential nominee Jack Kemp of New York. In 1998, Ryan won election to the United States House of Representatives, succeeding the two-term incumbent, fellow Republican Mark Neumann.
Ryan currently chairs the House Budget Committee, where he has played a prominent public role in drafting and promoting the Republican Party's long-term budget proposal. He introduced a plan, The Path to Prosperity, in April 2011 as an alternative to the budget proposal of President Barack Obama, and helped introduce The Path to Prosperity: A Blueprint for American Renewal in March 2012, in response to Obama's 2013 budget. Ryan is one of the three co-founders of the Young Guns Program, an electoral recruitment and campaign effort by House Republicans. He endorsed Republican presidential candidate and former Governor of Massachusetts Mitt Romney for the 2012 United States presidential election. Ryan has been considered as a possible running mate for Romney.
David Deron Haye (born 13 October 1980) is a British professional boxer from England.
Haye is the former WBA heavyweight champion. He is also the former unified world cruiserweight champion, holding the WBA, WBC, WBO, and The Ring cruiserweight titles, and the former European cruiserweight champion.
Haye started his ambition and passion for boxing at old-school boxing gym Fitzroy Lodge Boxing Club in Lambeth, South London, where he quickly impressed and confidently won his first amateur bouts.
In 1999, 18-year-old Haye participated at the world amateur championships in Houston, Texas, USA at light-heavyweight but was eliminated by experienced American Michael Simms early in the contest.
At the 2001 World Amateur Boxing Championships in Belfast, Northern Ireland he fought in the heavyweight 201 lb division where he beat world class Sebastian Köber to reach the final where he gave Odlanier Solís a standing eight count before being stopped by the Cuban in round three, and taking the silver medal.