- published: 13 Feb 2016
- views: 1726
Eye color is a polygenic phenotypic character and is determined by two distinct factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris.
In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the iris pigment epithelium (located on the back of the iris), the melanin content within the iris stroma (located at the front of the iris), and the cellular density of the stroma. The appearance of blue, green, as well as hazel eyes results from the Rayleigh scattering of light in the stroma, a phenomenon similar to that which accounts for the blueness of the sky. Neither blue nor green pigments are ever present in the human iris or ocular fluid. Eye color is thus an instance of structural color and varies depending on the lighting conditions, especially for lighter-colored eyes.
The brightly colored eyes of many bird species result from the presence of other pigments, such as pteridines, purines, and carotenoids. Humans and other animals have many phenotypic variations in eye color. The genetics of eye color are complicated, and color is determined by multiple genes. So far, as many as 15 different genes have been associated with eye color inheritance. Some of the eye-color genes include OCA2 and HERC2. The once-held view that blue eye color is a simple recessive trait has been shown to be incorrect. The genetics of eye color are so complex that almost any parent-child combination of eye colors can occur. However, OCA2 gene polymorphism, close to proximal 5′ regulatory region, explains most human eye-color variation.
Grey or gray is an achromatic or neutral color.
Complementary colors are defined to mix to grey, either additively or subtractively, and many color models place complements opposite each other in a color wheel. To produce grey in RGB displays, the R, G, and B primary light sources are combined in proportions equal to that of the white point. In four-color printing, greys are produced either by the black channel, or by an approximately equal combination of CMY primaries. Images which consist wholly of neutral colors are called monochrome, black-and-white or greyscale.
The first recorded use of grey as a color name in the English language was in AD 700.Grey is the British, Canadian, Australian, Irish, New Zealand and South African spelling, although gray remained in common usage in the UK until the second half of the 20th century.Gray is the preferred American spelling, although grey is an accepted variant.Gray became the preferred spelling in American English around 1825.
Most grey pigments have a cool or warm cast to them, as the human eye can detect even a minute amount of saturation.[citation needed]Yellow, orange, and red create a "warm grey". Green, blue, and violet create a "cool grey". When there is no cast at all, it is referred to as "neutral grey", "achromatic grey" or simply "grey".
Macy Gray (born Natalie McIntyre, 6 September 1967 in Canton, Ohio, USA) is a Grammy Award-winning American R&B and soul singer-songwriter, record producer, and actress, famed for her distinctive raspy voice, and a singing style heavily influenced by Billie Holiday and Betty Davis.
Gray has released six studio albums, and has received five Grammy Award nominations, winning one. She has appeared in a number of films including Training Day, Spider-Man, Scary Movie 3, Lackawanna Blues, Idlewild and For Colored Girls. Gray is best known for her international hit single "I Try," taken from her multi-platinum debut album On How Life Is.
Macy Gray, was born to Laura McIntyre, a math teacher, and Otis Jones; Laura later remarried Richard McIntyre, who adopted Macy and fathered her brother Nathon and sister Nehlia.[citation needed] Gray was born in Canton, Ohio, where she briefly worked at age 12, before being fired for lateness. She decided to pursue a career in music after being expelled from Western Reserve Academy in Hudson, which she had attended from the age of 14. However, Gray's initial success came as a surprise. While attending the University of Southern California (graduated 1990) she agreed to write songs for a friend, and a demo session was scheduled for the songs to be recorded by another singer. When the vocalist failed to turn up, Gray recorded them herself. She then met writer/producer Joe Solo while working as a cashier in Beverly Hills. Together, they wrote a large collection of songs and recorded them in Solo's studio. The demo tape landed Gray the opportunity to sing at jazz cafés in Los Angeles, California. Despite Gray's dislike of her own voice,Atlantic Records signed her. She began recording her debut record but was dropped from the label upon the departure of her A&R man Tom Carolan, who signed her to the label. In 1998, she landed a record deal with Epic Records. She was on one of the songs from The Black Eyed Peas' debut album, "Love Won't Wait".
★Get Gray Eyes Fast!★ (Subliminals Brainwave Entrainment Vibration Intent Energy Frequencies)
I surgically changed my iris color from brown to gray / brightocular
Actor Khalil Underwood Permanently Changes his eye color / Bright Ocular
Slow Machete - Grey Eyed Bird
GRAY - Eye of the tiger (Bill Conti Cover)
Dorian- My gray eyed guy
The Black Eyed Peas - Request Line ft. Macy Gray
Classic Bombshell Smokey Eye | Jaclyn Hill
How to put on and take off contact lenses Hazel, Sea Green & Sterling Grey
8 Freshlook Colorblends Contacts on dark brown eyes 👀
My gray eyed guy- Dorian Nameri
SMOKEY EYE FOR BEGINNERS! + EYEBROW ROUTINE
LDR Gray Eyed Gunner
Сероглазый король (Gray-eyed King/El Rey con sus ojos grises)