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Doctor insights on: Genetic Cause Of Color Blindness

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Genetic (Definition)

From a medical standpoint, "genetic" refers to the potential heritability of various medical conditions. While some conditions are inevitable (at some point in one's life) as a consequence of simple genetic heritability (eg huntington's disease), a large number of medical conditions (including all behaviorial health disorders) are the expressed final pathway of a ...Read more


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What is the genetic cause of albinism?

What is the genetic cause of albinism?

Albinism vs vitiligo: If you are born with a genetic mutation that prevents production of melanin (and other pigments), then you are an albino and have albinism. If you begin to lose pigment (typically in patches) as you age, then you likely have vitiligo (e.g. Michael jackson), which is a skin condition where the pigment-producing cells die for various reasons. http://www.mayoclinic.com/health/vitiligo/ds00586. ...Read more

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Explain the symptoms of color blindness?

Explain the symptoms of color blindness?

Color blindnes: A color blind person does not know of his problem until he compares himself with others. The visual acuity is usually normal. Color recognition is diminished along the axis of confusion for the type of deficiency. If you have this you could not be employed in color dependent occupations such as microcomponent assembly or fruit grading. ...Read more

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What causes color blindness?

What causes color blindness?

Mostly genertic: In inherited color deficiency, a visual pigment has its spectrum of color reception altered to a small degree and to a large degree in those with high degree of this disorder. The photoreceptor count is the same, so the acuity is not lost - just the color recognition. There are a few less common color vision losses due to advanced retinal, optic nerve and CNS diseases. ...Read more

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What is the rate of occurence for color blindness in various major racial groups?

What is the rate of occurence for color blindness in various major racial groups?

Color blindness: Most color blindness is congenital and linked to the w chromosome. The rate is aound 7 per cent for boys and less than 1 per cent for girls. I am unaware of any racial differences in this incidence. ...Read more

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How is color blindness inherited?

Sex linked: The most common form is carried on the X chromosome and so it manifests more commonly by far in males who lack a corresponding X (as women do ) to compensate (males have a sort Y chromosome). It is therefore passed on to a male child from his mother who carries a defective X (and most likely a normal X matching it so she is not color deficient.). ...Read more

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Hemophiliacs and color blindness, are there related?

Hemophiliacs and color blindness, are there related?

Unrelated: These are products of abnormal genes acting upon an entirely separate system within the body. They can occur together but are not related in any way. ...Read more

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What sort of disease is color blindness?

What sort of disease is color blindness?

Color vision anomaly: Color blindness is a misnomer, as most color blind people see some colors, they just see the hues differently than the norm. This can be an advantage if looking at camoflage. Our cone cells come in three types to see red, blue and yellow, and the receptors in color vision defect patients are either lacking or at lower levels than i. ...Read more

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How many chromosomes are in the color blindness disorder?

Typically one: The mutations in genes affecting color vision are typically on the x-chromosome, but it has been shown that occasionally other chromosomes may be involved (perhaps as many as 20 different ones). Since males have only one x-chromosome (females two), color deficit is much more common in males (second x-chromosome in the female may be normal, to compensate). ...Read more

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What the 3 types of sex-linked color blindness?

What the 3 types of sex-linked color blindness?

Color Blindness: The majority of color vision deficiency (note I didn't say blindness as visual acuity is not usually affected) comes from a genetic disturbance causing poor or absent development of one or more familia of cone (color-receptor cell) in the retina. Most sufferers are male, since the genes for color vision reside on the X chromosome, only one of which is present in a male (XY versus XX in a female). ...Read more

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Describe signs, testing, causes, types and disadvantages in color vision deficiency?

Describe signs, testing, causes, types and disadvantages in color vision deficiency?

Too broad: No disadvantage except you can't be a fighter pilot or work in navy and your clothes tend to clash. ...Read more

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What is the occurrence of color blindness?

What is the occurrence of color blindness?

8% males 1/2% fem: Color deficiency is mostly an inherited defect of the light receptors with a strong sex linking. Therefore much more common in males. Some cases of lowered color deficiency can occur in global retinal losses such as advancing diabetes and there are a few rare central nervous system color deficiencies as reported by oliver sacks. ...Read more

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Is color blindness a dominantly or recessively inherited problem?

X-linked: The most common type of colorblindness is x-linked which means it occurs much more often in males and is carried but unexpressed in females. ...Read more

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What type of genetic mutation causes albinism?

What type of genetic mutation causes albinism?

Albinism: There are several. Go to wikipedia and https://www.ncbi.nlm.nih.gov/pubmed/ ...Read more

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What medical conditions can cause color blindness?

What medical conditions can cause color blindness?

Several: Color deficiency can occur with advanced diseases of the retina such as diabetes retinopathy and retinitis pigmentosa. Color vision changes can occur because of changes in the lens which alter color sensitivity. A few rare strokes in the brain can wipe out the color sensitivity. Most color deficiency is due to genetic changes in the chromosomes and is inherited. ...Read more

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What is the major cause of retinitis pigmentosa?

What is the major cause of retinitis pigmentosa?

It depends..: RP is a cause blindness. Its causes are multifactorial and exact cause depends on lots of other factors--like whether it occurs alone, or if it's associated with other symptoms or syndromes, or if it was secondary to a systemic disease. It's almost always genetic (there are >50 genes associated with RP), and it's often part of a syndrome, like Usher, Biedl-Bardet, Kearns-Sayer, McLeod, and others. ...Read more

Dr. David Chandler
78 doctors shared insights

Color Blind (Definition)

Ophthalmologist prefer to use the term color deficit as blindness conveys other meanings. Lowered color perception can be inherited (many forms), can result from advanced loss of retinal cells, inherited retinal disease, and some forms occur due to CNS injury. There are excellent tests for the various types and they can be functionally ...Read more


Dr. Damien Luviano
70 doctors shared insights

Blindness (Definition)

Vision impairment and blindness are conditions in which a person cannot see well or see at all, even with glasses or contact lenses. If a person's best vision (with correction) out of either eye is only 20/70 - 20/200, he is impaired. If he can see no better than 20/200 or his visual field is no more than 20 degrees (severe "tunnel" vision), ...Read more