Three gene pairs controlling human eye color are known. Two of the gene pairs occur on chromosome pair 15 and one occurs on chromosome pair 19. The bey 2 gene (EYCL3), on chromosome 15, has a brown and a blue allele. A second gene (EYCL1), located on chromosome 19 (the gey gene) has a blue and a green allele. A third gene, bey 1, located on chromosome 15, is a central brown eye color gene. Geneticists have designed a model using the bey 2 and gey gene pairs that explains the inheritance of blue, green and brown eyes. In ...

See also:

Eye color, Eye color - Colors, Eye color - Brown eyes, Eye color - Black eyes, Eye color - Hazel eyes, Eye color - Blue eyes, Eye color - Grey eyes, Eye color - Green eyes, Eye color - Blue-Green eyes, Eye color - Red eyes, Eye color - Heterochromia, Eye color - Genetics

Read more here: » Eye color: Encyclopedia II - Eye color - Genetics

See also:

Iris anatomy, Iris anatomy - General structure, Iris anatomy - Histological features, Iris anatomy - Anterior surface features, Iris anatomy - Posterior surface features, Iris anatomy - Embryology, Iris anatomy - Color, Iris anatomy - Genetic and physical factors determining iris color, Iris anatomy - Faking the iris color, Iris anatomy - Iris color as paternity test, Iris anatomy - Different colors in the two eyes, Iris anatomy - Red eye

Read more here: » Iris anatomy: Encyclopedia II - Iris anatomy - Color

The most basic form of CEV perception that can be immediately experienced in normal waking consciousness involves a seemingly random noise of pointilistic light/dark regions with no apparent shape or order. This can be seen when you close your eyes, but try to actively look with your eyes at the back of your closed eyelids. In a bright room, a dark red can be seen. In a dark room, blackness can be seen. But in either case it is not a flat unchanging redness/blackness. Instead, if actively observed for a few minutes, you become aware of an apparent disorganized motion, a random field of lightne ...

See also:

Closed eye hallucinations, Closed eye hallucinations - Level 1: The Visual Noise, Closed eye hallucinations - Level 2: Light/Dark flashes, Closed eye hallucinations - Level 3: Patterns motion and color, Closed eye hallucinations - Level 4: Objects and Things, Closed eye hallucinations - Level 5: Overriding physical perception, Closed eye hallucinations - Image Burn-In, Closed eye hallucinations - Protein Strings, Closed eye hallucinations - Corneal Liquid, Closed eye hallucinations - Blue-Sky Sprites

Read more here: » Closed eye hallucinations: Encyclopedia II - Closed eye hallucinations - Level 1: The Visual Noise

Closed eye hallucinations or closed eye visualizations (CEV) is a term used to describe a distinct class of hallucination, which generally only occurs when one's eyes are closed, or one is in a darkened room. In particular, this is the primary form of hallucination encountered with the disassociative anaesthetic class of drugs, such as Ketamine, DXM and PCP. These compounds r ...

Including:

Closed eye hallucinations - Level 1: The Visual Noise Closed eye hallucinations - Level 2: Light/Dark flashes Closed eye hallucinations - Level 3: Patterns motion and color Closed eye hallucinations - Level 4: Objects and Things Closed eye hallucinations - Level 5: Overriding physical perception Closed eye hallucinations - Image Burn-In Closed eye hallucinations - Protein Strings Closed eye hallucinations - Corneal Liquid Closed eye hallucinations - Blue-Sky Sprites

Read more here: » Closed eye hallucinations: Encyclopedia - Closed eye hallucinations

Visions of Lights in Meditation

Various kinds of lights manifest during meditation owing to concentration. In the beginning, a bright, white light, the size of a pin's point will appear in the forehead in Trikuti which corresponds tentatively to the Ajna Chakra of the astral body. When the eyes are closed, you will notice different colored lights such as white, yellow, red, smoky, blue, green, mixed color, flashes like lightning, like fire, burning charcoal, fire-flies, the moon, the sun and stars. These lights appear in the mental space, Chidakasha. These are all Tanmatric lights.

Read more here: » Mystical Experiences: Visions of Lights in Meditation

The terms, "Indigo" and "Crystal" were given to two generations of children, because they most accurately describe their aura colors and energy patterns. Indigo Children have a lot of indigo blue in their auras. This is the color of the "third eye chakra," which is an energy center inside the head located between the two eyebrows. This chakra regulates clairvoyance, or the ability to see energy, visions, and spirits.

Many of the Indigo Children are clairvoyant The Crystal Children have opalescent auras, with beautiful multi-colors in pastel hues. This generation also shows a fascination for crystals and rocks, as you'll read in this book.

Read more here: » Crystal Children: Indigo and Crystal Children

At a sufficiently deep level of relaxation, the noise becomes highly organized, taking on complex geometric patterns and shapes, as if it were a field of tiny stars, squares, or diamonds, floating over and under each other in ribbons and fields. This level is relatively easily accessible to people that smoke marijuana, and appears to be what most people refer to as the colorful visuals. However, this is also accessible to people involved in deep concentration for long periods of time, such as doing complex math or geometry prob ...

See also:

Closed eye hallucinations, Closed eye hallucinations - Level 1: The Visual Noise, Closed eye hallucinations - Level 2: Light/Dark flashes, Closed eye hallucinations - Level 3: Patterns motion and color, Closed eye hallucinations - Level 4: Objects and Things, Closed eye hallucinations - Level 5: Overriding physical perception, Closed eye hallucinations - Image Burn-In, Closed eye hallucinations - Protein Strings, Closed eye hallucinations - Corneal Liquid, Closed eye hallucinations - Blue-Sky Sprites

Read more here: » Closed eye hallucinations: Encyclopedia II - Closed eye hallucinations - Level 3: Patterns motion and color

At a sufficiently deep level of relaxation, the noise becomes highly organized, taking on complex geometric patterns and shapes, as if it were a field of tiny stars, squares, or diamonds, floating over and under each other in ribbons and fields. This level is relatively easily accessible to people that smoke marijuana, and appears to be what most people refer to as the colorful visuals. However, this is also accessible to people involved in deep concentration for long periods of time, such as doing complex math or geometry prob ...

See also:

Closed eye hallucinations, Closed eye hallucinations - Level 1: The Visual Noise, Closed eye hallucinations - Level 2: Light/Dark flashes, Closed eye hallucinations - Level 3: Patterns, motion, and color, Closed eye hallucinations - Level 4: Objects and Things, Closed eye hallucinations - Level 5: Overriding physical perception, Closed eye hallucinations - Image Burn-In, Closed eye hallucinations - Protein Strings, Closed eye hallucinations - Corneal Liquid, Closed eye hallucinations - Blue-Sky Sprites

Read more here: » Closed eye hallucinations: Encyclopedia II - Closed eye hallucinations - Level 3: Patterns, motion, and color

This is a fairly deep state, typically only accessible through psychoactives or people who have practiced meditation for a long time. At this level, what you are thinking becomes visually manifest as if it were a real object or environment. When this level is reached, the CEV noise seems to calm down and fade away, leaving behind an intense flat ordered blackness. The visual field becomes a sort of active space where what you think is what you get. A side component of this is the ability to feel motion if your eyes are closed. For example th ...

See also:

Closed eye hallucinations, Closed eye hallucinations - Level 1: The Visual Noise, Closed eye hallucinations - Level 2: Light/Dark flashes, Closed eye hallucinations - Level 3: Patterns motion and color, Closed eye hallucinations - Level 4: Objects and Things, Closed eye hallucinations - Level 5: Overriding physical perception, Closed eye hallucinations - Image Burn-In, Closed eye hallucinations - Protein Strings, Closed eye hallucinations - Corneal Liquid, Closed eye hallucinations - Blue-Sky Sprites

Read more here: » Closed eye hallucinations: Encyclopedia II - Closed eye hallucinations - Level 4: Objects and Things

Color blindness, or color vision deficiency, in humans is the inability to perceive differences between some or all colors that other people can distinguish. It is most often of genetic nature, but may also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals. The English chemist John Dalton in 1794 published the first scientific paper on the subject, "Extraordinary facts relating to the vision of colors", after the realization of his own color blindness; because of Dalton's work, the condition is sometimes called Daltonism, although this term is now used for a type of c ...

Including:

Color blindness - Prevalence Color blindness - Causes of color blindness Color blindness - Classification of color deficiencies
Color blindness - Red-green color blindness Color blindness - Blue-yellow color blindness Color blindness - Monochromacy
Color blindness - Diagnosis Color blindness - Treatment and management Color blindness - Design implications of color blindness Color blindness - Misconceptions & Compensations

Read more here: » Color blindness: Encyclopedia - Color blindness

A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color filters on a square grid of photosensors. The term derives from the name of its inventor, Bryce Bayer of Eastman Kodak, and refers to a particular arrangement of color filters used in most single-chip digital cameras. Bryce Bayer's patent called the green photosensors luminance-sensitive elements and the red and blue ones chrominance-sensitive elements. He used twice as many green elements as red or blue to mimic the human eye's greater resolving power with green light. These elements are referred t ...

Including:

Bayer filter - An illustrated explanation of color image reconstruction

Read more here: » Bayer filter: Encyclopedia - Bayer filter

In the study of the perception of color, one of the first mathematically defined color spaces was the CIE XYZ color space (also known as CIE 1931 color space), created by the International Commission on Illumination (CIE) in 1931. The human eye has receptors for short (S), middle (M), and long (L) wavelengths, also known as blue, green, and red receptors. That means that one, in principle, needs three parameters to describe a color sensation. A specific method for associating three numbers (or tristimulus values) with each colo ...

Including:

CIE 1931 color space - The CIE xy chromaticity diagram CIE 1931 color space - Definition of the CIE XYZ color space
CIE 1931 color space - Experimental results - The CIE RGB color space CIE 1931 color space - Grassmann's Law CIE 1931 color space - Construction of the CIE XYZ color space from the Wright-Guild data
CIE 1931 color space - Problems and solutions

Read more here: » CIE 1931 color space: Encyclopedia - CIE 1931 color space

White tigers are tigers with pink noses and white to cream colored fur with black, grey or chocolate-colored stripes; their eyes are usually blue, but may be green or amber. There are around 600 white tigers in the world. Because this coloration is so striking, white tigers have become popular attractions in zoos and entertainment that showcases exotic animals; the magicians Siegfried and Roy are famous for using several trained white tigers in their shows. Contrary to popular belief, white tigers are not an endangered species in their own right, but are a sel ...

Including:

White tiger - White Tigers in Captivity White tiger - Inbreeding Depression White tiger - Historical records

Read more here: » White tiger: Encyclopedia - White tiger

There is also a village named Argyria in Greece (pronunciation: ar-YEE-ree-a) , see Argyria, Greece. Argyria (ISV from Greek: αργύρος argyros silver + -ia) is a disease caused by the ingestion of elemental silver, silver dust or silver compounds. The most dramatic effect of argyria is that the skin is colored blue or bluish-grey. Argyria may be found as generalized argyria or local argyria. Argyrosis is the corresponding condition related to the eye. The condition is believed to be permanent. Most recent cases are due to the consumption o ...

Read more here: » Argyria: Encyclopedia - Argyria

This is the point where it appears to the outside world that a person is either unconscious or insane. The internal CEV perceptions and think-it/feel-it perceptions become stronger than physical perceptions, and completely override and replace open-eye physical perceptions. This can be a somewhat dangerous state if a person is still mobile while literally off in their own little world, but by this time most people are motionless on the ...

See also:

Closed eye hallucinations, Closed eye hallucinations - Level 1: The Visual Noise, Closed eye hallucinations - Level 2: Light/Dark flashes, Closed eye hallucinations - Level 3: Patterns motion and color, Closed eye hallucinations - Level 4: Objects and Things, Closed eye hallucinations - Level 5: Overriding physical perception, Closed eye hallucinations - Image Burn-In, Closed eye hallucinations - Protein Strings, Closed eye hallucinations - Corneal Liquid, Closed eye hallucinations - Blue-Sky Sprites

Read more here: » Closed eye hallucinations: Encyclopedia II - Closed eye hallucinations - Level 5: Overriding physical perception

When photographed with a flash, the iris only reacts to protect the retina, and not fast enough to avoid the red-eye effect. This represents reflection of light from the back of the eye, and is closely related to the term red reflex, used by ophthalmologists in describing appearances on fundal examination. When used as a descriptive term in medicine, the meaning of "red eye" is quite different, and indicates that the bulbar conjunctiva is reddened due to dilatation of superficial blood vessels. Leaving aside rarities, it ...

See also:

Iris anatomy, Iris anatomy - General structure, Iris anatomy - Histological features, Iris anatomy - Anterior surface features, Iris anatomy - Posterior surface features, Iris anatomy - Embryology, Iris anatomy - Color, Iris anatomy - Genetic and physical factors determining iris color, Iris anatomy - Faking the iris color, Iris anatomy - Iris color as paternity test, Iris anatomy - Different colors in the two eyes, Iris anatomy - Red eye

Read more here: » Iris anatomy: Encyclopedia II - Iris anatomy - Red eye

The iris is divided into two major regions: The pupillary zone is the inner region whose edge forms the boundary of the pupil. The ciliary zone is the rest of the iris that extends to its origin at the ciliary body. The collarette is the region of the iris separating the pupillary portion from the ciliary portion. It is typically defined as the region where the sphincter muscle and dilator muscle overlap. See also:

Iris anatomy, Iris anatomy - General structure, Iris anatomy - Histological features, Iris anatomy - Anterior surface features, Iris anatomy - Posterior surface features, Iris anatomy - Embryology, Iris anatomy - Color, Iris anatomy - Genetic and physical factors determining iris color, Iris anatomy - Faking the iris color, Iris anatomy - Iris color as paternity test, Iris anatomy - Different colors in the two eyes, Iris anatomy - Red eye

Read more here: » Iris anatomy: Encyclopedia II - Iris anatomy - General structure

Color blindness is not the swapping of colors in the observer's eyes. Grass is never red, stop signs never green. Distinguishing a Granny Smith from a Braeburn is not a problem. The color impaired do not learn to call red "green" and vice versa. Most color blind persons have learned their vulnerabilities and are acutely aware of just which colors will be confused. In some cases this can lead to an acute color sensitivity due to the fact that nuance of color will need to be categorized more clearly. A person who has limited ability to ...

See also:

Color blindness, Color blindness - Prevalence, Color blindness - Causes of color blindness, Color blindness - Classification of color deficiencies, Color blindness - Red-green color blindness, Color blindness - Blue-yellow color blindness, Color blindness - Monochromacy, Color blindness - Diagnosis, Color blindness - Treatment and management, Color blindness - Design implications of color blindness, Color blindness - Misconceptions & Compensations

Read more here: » Color blindness: Encyclopedia II - Color blindness - Misconceptions & Compensations

It is common to introduce the idea of common knowledge by some variant of the following logic puzzle:[2] On an island, there are n people, of whom k > 1 have blue eyes, and the rest have green. If a person ever knows herself to have blue eyes, he or she must leave the island at dawn the next day. Each person knows every other's eye color, there are no mirrors, and there is no discussion of eye color. At some point, an outsider comes to t ...

See also:

Common knowledge, Common knowledge - Example, Common knowledge - Logical formulation, Common knowledge - Applications, Common knowledge - Notes, Common knowledge - External link

Read more here: » Common knowledge: Encyclopedia II - Common knowledge - Example

Media that transmit light (such as television) use additive color mixing with primary colors of red, green, and blue, each of which stimulates one of the three types of the eye's color receptors with as little stimulation as possible of the other two. This is called "RGB" color space—see also RGB color model. Mixtures of light of these primary colors cover a large part of the human color space and thus produce a large part of human color experiences. This is why color television sets or color computer monitors need only produce mixtures o ...

See also:

Color models, Color models - Tristimulus color space, Color models - Tristimulus color space as a mathematical projection, Color models - CIE XYZ color space, Color models - RGB color space, Color models - CMYK color model, Color models - HLS color space, Color models - HSV color space, Color models - Color systems

Read more here: » Color models: Encyclopedia II - Color models - RGB color space