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Topic: Eye color


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In the News (Fri 10 Oct 08)

  
 Reading on Color & Light, Part I
Colors in this purple portion of the color wheel are composed of mixtures of wavelength and cannot be represented by a single wavelength.
The color purple shown in the color wheel (b) is composed of a mixture of light in the red and violet regions of the spectrum.
Color is perceived in the retina by three sets of cones which are photoreceptors with sensitivity to photons whose energy broadly overlaps the blue, green and red portions of the spectrum.
acept.la.asu.edu /PiN/rdg/color/color.shtml   (1624 words)

  
 Topic 50. The response of the eye to color
They are most sensitive to colors in the green portion of the spectrum near 500 nm, so that when the light is dim it is easiest to see objects that either radiate or reflect green light.
In other words, the short-wavelength cone, which is sensitive primarily to a broad band of colors in the blue and green portions of the spectrum, cannot provide any information on the wavelength of the incident light beyond the fact that it has been triggered by some wavelength within its response band.
In particular, the fact that the combination of two colors (such as red and green) can produce a third color, whose wavelength is not related in any obvious way to its two parents is not a direct result of the previous discussion.
www.colorado.edu /physics/phys1230/phys1230_fa01/topic50.html   (1587 words)

  
 The Genetics of Human Eye Color   (Site not responding. Last check: 2007-10-30)
Eye color is a physical trait that is genetically determined.
In basic terms, eye color is determined by the amount of a pigment called melanin that is in the iris of the eye.
The exact color of the human eye is determined by the amount of a single pigment called melanin that is present in the iris of the eye.
www.seps.org /cvoracle/faq/eyecolor.html   (1333 words)

  
 Color Blindness
Color blindness is used in colloquial terms to refer to the difficulty in telling colors apart but a more correct term would be color vision defect.
Color blindness is a misnomer because only a small percentage of people are unable to see any color.
Color vision defects sometimes can be acquired, as a result of eye disease or normal aging or as a side effect of certain medications.
www.uic.edu /com/eye/LearningAboutVision/EyeFacts/ColorBlindness.shtml   (890 words)

  
 EyeWest Vision & Optical: Eye Diseases - Color Blindness, Color Vision
Color vision deficiency does not usually interfere with visual acuity and correction of this deficiency is limited at present.
Color deficiency is defined as the absence of or defect in the perception of colors.
Color deficiency in which all colors are perceived as gray is termed monochromasia.
www.eyewestvisionclinic.com /youreyes/color-vision.shtml   (309 words)

  
 Eye Color in Dogs
Eye color in wild canids is generally light, wolves have eyes with pale irises.
The difficulty in studying this is that the coat color genes also influence eye color and so studies of eye color intensity inheritance need to be conducted in lineages in which coat color does not vary.
If the white head markings are assymetrical they may have a blue eye on the side of the head with the most white and a brown eye on the colored side of the head.
netpet.batw.net /genetics/dog.i.color.html   (683 words)

  
 Heritablity, human eye color [Athro Limited: Evolution]
Eye colors are distinct (brown, green, blue) rather than mixed.
Eye colors of children came out as pure green, blue, or brown, not as a mixture of the colors of their parents' eyes.
Eye color at birth is often blue, and later turns to a darker color.
www.athro.com /evo/gen/inherit1.html   (1218 words)

  
 human eye color chart special websites   (Site not responding. Last check: 2007-10-30)
apparent to the eye in the vivid color...
This color is ideal for the fruiting and...
FF0000 Red is a color at the lowest frequencies of light discernible by the human eye.
www.thechart.info /topics/humaneyecolorchart   (797 words)

  
 - Eye Tests - Color vision   (Site not responding. Last check: 2007-10-30)
The appreciation of color is a function of the cones of the eye, the three types of which are maximally sensitive to either blue, green, or red.
The numbers are visible to individuals with normal color vision but are confused or invisible to those individuals who are red/green color deficient.
Congenital color defects (such as red/green color "blindness") and optic nerve disorders tend to produce red/green defects whereas acquired disorders of the macula tend to produce blue/yellow color vision defects.
www.eyemdlink.com /doctorweb/tymiakwrap/Test.asp?TestID=4   (128 words)

  
 Eye Color and Development   (Site not responding. Last check: 2007-10-30)
In many species, eye color changes as the bird matures and can serve as a means of determining an individual's age.
Although the physiology of iris pigmentation is poorly understood, changes in color with age and with season are likely to be under hormonal control, especially where colors are closely associated with the sexual cycle.
Changes of eye color with age are found in a wide variety of avian families including the loons, grebes, ducks, hawks, pheasants, gulls, alcids, woodpeckers, mimic thrushes, vireos, and flbirds.
www.stanford.edu /group/stanfordbirds/text/essays/Eye_Color.html   (288 words)

  
 Eye Craft, LLC - Color Vision
Color blindness (color vision deficiency) is a condition in which certain colors cannot be detected.
In the most severe form of color blindness everything is seen in shades of gray.  Except in the most severe form, color blindness does not affect the sharpness of vision at all.
Most color vision problems that occur later in life are a result of disease, trauma, toxic effects from drugs, metabolic disease, or vascular disease.
www.eye-craft.com /color_vision.htm   (372 words)

  
 Color Blindness Check
They are more sensitive than the color receptors, that is why we have poor color perception in the dark.
Red-green color blindness is a result of a lack of red receptors.
It is also possible to have the color receptors missing entirely, which would result in fl and white vision.
www.geocities.com /Heartland/8833/coloreye.html   (224 words)

  
 WonderQuest: Eye color can change with age
My aunt used to have brown eyes but now, at the age of 80, her eyes are green/grey.
The lighter the pigment and the fewer the granules — the lighter the iris color.
Eye color probably changes for the same reason we have one head instead of two: genes.
www.wonderquest.com /eye-color-age.htm   (678 words)

  
 Aussie Eye Color and Eyeshine
The two eyes of one dog are not always both the same color; one may be pigmented while the other eye is blue, or both may be pigmented but be of different colors.
Blue eyes are not confined to merles; there is a recessive gene in the breed that produces blue or split blue eyes in solid colored dogs as well.
Chaps is a grandson of Krackers, a Slyrock dam.
www.ashgi.org /color/aussie_eye_color.htm   (2700 words)

  
 Eye Color in Oriental Shorthairs (and other cats)
This color is caused by the biological pigment melanin, and in cats ranges from very pale yellow or tan to deep orange or brown.
The same holds true for the partial albino Siamese colored pointed cats, and in dominant solid white and/or piebald white cats in cases where the effects of those color genes extends to the iris of one or both eyes.
Offspring of one of these blue eyed, but normal body colored cats, and a typical yellow-green eyed Oriental, or a pale blue-eyed pointed cat, have had eye colors ranging from rich medium green to teal or aqua blue-green.
www.cc.ysu.edu /~helorime/eyecol.html   (847 words)

  
 Change Your Eye Color with Colored Contact Lenses - AllAboutVision.com
Many of these colored contact lenses are available in plano form (without visual correction), as well as in designs for people who have astigmatism, who need bifocal correction, or who want a disposable or frequent replacement lens.
While color contacts can be fun, doctors warn wearers not to share their colored lenses — or any contact lenses, for that matter — with friends, and not to swap colors with friends.
If your skin, hair, makeup and natural eye colors are warm-toned, you might choose a warm color contact lens such as hazel to match and blend in.
www.allaboutvision.com /contacts/colors.htm   (1440 words)

  
 GeneTree Eye Color Inheritance Chart   (Site not responding. Last check: 2007-10-30)
The probable eye color of the biological father when the eye colors of the mother and the child are known.
Eye color is known to have a polygenic inheritance pattern, possibly governed by 6 or more genes.
In conclusion, eye color is not a very reliable or accurate method to use when attempting to determine paternity of a child.
www.testsymptomsathome.com /gti11_eye_color.asp   (513 words)

  
 BC Museum: Eye Color
We were originally going to make this a page for blue eyes, but have decided that it should cover all eye colors in the breed.
Eyes of two different colors was once considered an asset for a working collie, as it was thought that one of the eyes controlled the sheep inbye or close up, and one controlled the sheep ootbye (outbye) or at a distance.
We have been looking for some examples of green eyes, and hoped we might find it among the blue dogs, but this is the only one of two we have been able to find, possibly because it's often difficult to distinguish between green eyes and yellow or pale amber ones.
www.gis.net /~shepdog/BC_Museum/Permanent/BC_ColorEyes.html   (793 words)

  
 Human eye color genetics [Athro Limited: Evolution]
Human eye color is controlled by at least three genes, though we only understand two of them well.
We know that there are fl eyes, grey eyes, hazel eyes, and differing shades of brown, blue, and green eyes that are not explained by these two genes.
Human eye color inheritance is a complicated polygenic system than we are pretending in this simplified two gene example.
www.athro.com /evo/inherit.html   (287 words)

  
 Eye Color
All eye colors are acceptable in The Siberian Husky according the Official AKC Siberian Husky Standard.
If a puppy's eyes are blue at 4 weeks of age the chances are in their favor to continue blue.
If after reading this you still want to purchase for eye color understand that we cannot hold a puppy on the basis of eye color because there are always folks who do not care if the eyes are blue or brown, and simply want a high quality Siberian Husky puppy.
www.mikaylakennels.com /eye_color.htm   (566 words)

  
 Ritual To Change Eye Color
You must have complete focus and be concentrating only on changing the eye color, any other distractions must be cleared from the mind.
Now see that color slowly change to the color you wish your eyes to become.
Upon opening your eyes, you may or may not be able to see the change in the mirror.
www.magicwicca.com /rituals/eyecolor.htm   (278 words)

  
 Eye Color - Boxer Board   (Site not responding. Last check: 2007-10-30)
Boz's eyes are the same color now as they were when we brought him home at 5 weeks, but that doesn't mean all boxers are the same.
I have seen pictures of Boxers with lighter colored eyes though and wondered if they were that way when they were born.
Her eyes were light when she was a puppy, and have stayed the same.
www.boxerworld.com /forums/showthread.php?t=25225   (376 words)

  
 Eye color mocks easy rules
An albino's eyes are red because the lack of brown pigment lets the red color of red blood cells show.
Indeed, eyes of all colors have about the same amount of pigment in the IPE, except an albino’s red eyes.
Blue eyes are blue for the same reason that the sky is blue.
www.wonderquest.com /eye-color.htm   (653 words)

  
 eye anatomy
The canal of Schlemm is the passageway for the aqueous fluid to leave the eye.
The retina is the innermost coat of the back of the eye, formed of light-sensitive nerve endings that carry the visual impulse to the optic nerve.
The sclera is the white of the eye.
www.discoveryfund.org /anatomyoftheeye.html   (391 words)

  
 eye color
A person's eye color is determined by how much melanin, a dark brown pigment, is deposited in the iris of the eye.
Other eye colors such as green or hazel are the result of intermediate amounts of melanin.
As a baby grows, melanin production increases, and the eye color genes determine how much pigment is produced and where it is placed.
www.seps.org /oracle/oracle.archive/Life_Science.Genetics/2000.12/000976145799.9428.html   (215 words)

  
 Eye Colors of the Siberian Husky
In addition to the splendid variety of coat colors available, Siberian Huskies may also have a variety of eye colors.
As with coat color, all colors and color combinations are acceptable, no color should be given preference in the show ring.
We invite you to look into their eyes and imagine the snowy scenes this breed has viewed over the past few thousand years.
www.huskycolors.com /eye.html   (258 words)

  
 Cause of red eye
Red eye is more pronounced in people with light eye color.
The color of the eyes in the picture also depends on the angle at which you take a photo.
Yellow or green eyes are ok in pets photos, but if you see this in photos of humans, it may indicate a serious problem.
www.colorpilot.com /redeye_effect.html   (595 words)

  
 [No title]
This condition is associated with color blindness, visual acuity loss, extreme light sensitivity and nystagmus.
Color Blindness - Color Blindness Color blindness is used in colloquial terms to refer to the difficulty in telling colors apart but a more correct term would be color vision
Creamer Color Chart - Screening test for the early detection of red-green colorblindness in children.
www.diseasedirectory.net /Eye_Disorders/Color_Blindness/default.aspx   (398 words)

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