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Blue Colour Blindness


  • A few demonstrations are presented which show that a traditional explanation of high-spatial-frequency tritanopia (including small-field tritanopia), based on the hypothetical process of filling-in, is not correct.[ncbi.nlm.nih.gov]
  • The following sources of non congenital color blindness primarily present as blue yellow color blindness: Alcoholics present a higher incidence rate of tritanopia could be counted.[colour-blindness.com]
  • This means the S-cones are completely missing and only long- and medium-wavelength cones are present. Tritanomaly : This is an alleviated form of blue-yellow color blindness, where the S-cones are present but do have some kind of mutation.[iristech.co]
  • Color blindness is sometimes classed as a disability. However, in certain situations it can have an advantage over normal color vision – those who are color blind are better at penetrating certain color camouflages.[amoils.com]
  • "Inter-American Convention on the Elimination of All Forms of Discrimination against Person with Disabilities". Archived from the original on 2013-04-16. Retrieved 2012-03-09. Larson A (22 May 2016).[en.wikipedia.org]
  • Color blindness is usually classed as disability ; however, in selected situations color blind people have an advantage over people with normal color vision.[tritanopia.askdefine.com]
  • Look up "tritanopia" at Merriam-Webster Look up "tritanopia" at dictionary.com In other languages: Spanish French Italian Portuguese Romanian German Dutch Swedish Russian Polish Czech Greek Turkish Chinese Japanese Korean Arabic Advertisements Word of[wordreference.com]
  • Tritanopia 85 millions of speakers Translator English - Vietnamese tritanopia 80 millions of speakers Translator English - Tamil டிரைடனோபியா 75 millions of speakers Translator English - Marathi ट्रिटानोपिया 75 millions of speakers Translator English - Turkish[educalingo.com]
  • […] in Portuguese: Daltonismo tritanopia in Russian: Дальтонизм tritanopia in Slovenian: Barvna slepota tritanopia in Serbian: Далтонизам tritanopia in Finnish: Värisokeus tritanopia in Swedish: Färgblindhet tritanopia in Tamil: நிறக்குருடு tritanopia in Turkish[tritanopia.askdefine.com]
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  • From an evolutionary perspective a hunting group will be more effective if it includes a color blind hunter (one in twenty) who can spot prey that others cannot. Another possible advantage could be due to the presence of tetrachromic female.[tritanopia.askdefine.com]
  • […] of arc the forced choice response approaches five, which would be expected by chance (that is, the observers have reached a tritanopic zone) This method of examining the two and three wavelength matches for all apertures was found to be lengthy and fatiguing[bjo.bmj.com]
  • I got these as a gift for my stepmom and she literally thought it was a gag gift. They are cheaply made and didn't do anything to correct her vision.[amazon.com]
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  • In rare cases, transient color blindness occurs in the aura of some migraine sufferers.[amoils.com]
  • Transient color blindness also occurs (very rarely) in the aura of some migraine sufferers. The different kinds of inherited color blindness result from partial or complete loss of function of one or more of the different cone systems.[tritanopia.askdefine.com]
  • […] tweet Added February 22, 2010, Under: Headaches & Migraines , Health , Men's Health , Women's Health Last week I received a comment from a reader who told me that she suffered from Tritanopia and because of that not all of the Amoils web site was easy[amoils.com]
  • Usually I'd call the resulting color 'grey' because I'm not really sure how to define it but usually I get a really bad headache if I look long enough at it.[forevercached.syphzero.net]


  • About Jane writes for Healing Natural Oils, a producer and retailer of high-quality, all-natural treatments for a variety of conditions.[amoils.com]
  • He is currently involved in a collaborative project with the University of Utrecht, on model based and model free analyses of fMRI activation patterns obtained from individuals with verbal auditory hallucinations, and an experimental treatment method[books.google.de]
  • The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.[orpha.net]
  • No other health problems are known to be associated and no treatment is available.[disorders.eyes.arizona.edu]


  • Diagnosis and Prognosis: This is a stable disorder present at birth with no evidence that the retinal disease is progressive.[disorders.eyes.arizona.edu]


  • Etiology It is associated with a deficiency or absence of blue-sensitive cone photoreceptor function. The disease is caused by point mutations in the gene encoding the blue-sensitive visual pigment.[orpha.net]
  • Etiologically, it is attributed to an autosomal disorder linked to chromosome 7. As a consequence, the condition affects males and females in equal measure.[hallucinations.enacademic.com]
  • Classification of color deficiencies By etiology Color vision deficiencies can be classified as acquired or inherited.[tritanopia.askdefine.com]


  • Summary Epidemiology It affects between 1 in 13,000 and 1 in 15,000 newborns. Clinical description Red and green vision is unaffected. Etiology It is associated with a deficiency or absence of blue-sensitive cone photoreceptor function.[orpha.net]
  • Epidemiology [ edit ] Achromatopsia is a relatively uncommon disorder, with a prevalence of 1 in 30,000 people. However, on the small Micronesian atoll of Pingelap, approximately five percent of the atoll's 3,000 inhabitants are afflicted.[en.wikipedia.org]
Sex distribution
Age distribution


  • Pathophysiology [ edit ] The hemeralopic aspect of achromatopsia can be diagnosed non-invasively using electroretinography.[en.wikipedia.org]


  • But the new rules prevent this, removing this clue that a flashing beacon is there, not a traffic light on night flash. A new LED signal in Japan has a magenta X on an otherwise red lamp. The X looks bluish to someone with deuteranopia.[midimagic.sgc-hosting.com]
  • It is often stated that it is important to identify these problems as soon as possible and explain them to the children to prevent possible problems and psychological traumas.[tritanopia.askdefine.com]
  • Mutations in GNAT2 tend to result in a truncated and, presumably, non-functional protein, thereby preventing alteration of cGMP levels by photons.[en.wikipedia.org]

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