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.

Kellen Boswell Winslow (born November 5, 1957) is a former American professional football player in the National Football League (NFL). A member of the Pro Football Hall of Fame, he is widely recognized as one of the greatest tight ends in the league's history. Winslow played his entire NFL career from 1979 to 1987 with the San Diego Chargers after being selected in the first round of the 1979 NFL Draft. He played college football for the University of Missouri, where he was a consensus All-American. He was also inducted into the College Football Hall of Fame. Winslow is currently the athletic director at Central State University.

Winslow did not play high school football until his senior year. Until then, he was a self-described "nerd" who played chess. He was drafted in the first round of the 1979 NFL Draft by the Chargers and played for them until 1987, when he retired from football due to injury. Winslow, as part of Air Coryell, led the NFL in receptions in 1980 and 1981, becoming the first tight end ever to lead the league in receptions in back to back seasons. He also exceeded the 1,000 yards receiving milestone in 3 different seasons, including setting an NFL single season record for receiving yards by a tight end with 1,290 yards in the 1980 season. The record stood until Rob Gronkowski totaled 1,327 in 2011. In a 1981 regular season game, Winslow tied an NFL record by catching five touchdown passes.

Alicia Augello Cook (born January 25, 1981), better known by her stage name Alicia Keys, is an American R&B singer-songwriter, record producer, and actress. Keys was raised by a single mother in the Hell's Kitchen area of Manhattan in New York City. At age seven, Keys began playing the piano. She attended Professional Performing Arts School and graduated at 16 as valedictorian. Keys released her debut album with J Records, having had previous record deals first with Columbia and then Arista Records.

Keys' debut album, Songs in A Minor, was a commercial success, selling over 12 million copies worldwide. She became the best-selling new artist and best-selling R&B artist of 2001. The album earned Keys five Grammy Awards in 2002, including Best New Artist and Song of the Year for "Fallin'". Her second studio album, The Diary of Alicia Keys, was released in 2003 and was also another success worldwide, selling eight million copies. The album garnered her an additional four Grammy Awards in 2005. Later that year, she released her first live album, Unplugged, which debuted at number one in the United States. She became the first female to have an MTV Unplugged album to debut at number one and the highest since Nirvana in 1994.

Blake Tollison Shelton (born June 18, 1976) is an American country music artist. In 2001, he made his debut with the single "Austin". Released as the lead-off single from his self-titled debut album, "Austin" went on to spend five weeks at Number One on the Billboard Hot Country Songs charts. This song was the first single from his gold-certified debut album, which also produced two more Top 20 hits. Although the album was released on Giant Records Nashville, Shelton was transferred to Warner Bros. Records Nashville after Giant closed in late 2001.

His second and third albums, 2003's The Dreamer (his first for Warner Bros. proper) and 2004's Blake Shelton's Barn & Grill, were each certified gold as well. Shelton's fourth album, Pure BS, was issued in 2007, and re-issued in 2008 with a cover of Michael Bublé's pop hit "Home" as one of the bonus tracks. This cover was also that album's third single. A fifth album, Startin' Fires, was released in November 2008. It was followed by the extended plays Hillbilly Bone and All About Tonight in 2010, and the album Red River Blue in 2011. He is currently a vocal coach on the NBC reality talent show The Voice with Adam Levine, Christina Aguilera, and Cee Lo Green.

Chris Rea ( /ˈriːə/ REE-ə; born Christopher Anton Rea, 4 March 1951) is an English singer-songwriter, recognisable for his distinctive, husky voice and slide guitar playing. The British Hit Singles & Albums stated that Rea was "one of the most popular UK singer-songwriters of the late 1980s. He was already a major European star by the time he finally cracked the UK Top 10 with his 18th chart entry; "The Road to Hell (Part 2)". By 2009, Rea had sold more than 30 million albums worldwide.

He is well known for his 1978 hit song "Fool (If You Think It's Over)" that charted #12 on the Billboard Hot 100 and spent three weeks at #1 on the U.S. Billboard adult contemporary chart. The song was later covered by Elkie Brooks and was a top 20 hit in the UK.

Although Rea had limited success in the United States, two of his albums, The Road to Hell and Auberge, topped the UK Albums Chart. The book Guinness Rockopedia described him as a "gravel-voiced guitar stalwart".

Rea was born in Middlesbrough, England, the son of ice cream producer Camillo Rea who together with his brother Gaetano owned an ice cream factory and ran twenty-one cafés.