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Doctor insights on: Causes Color Blindness

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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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Dr. Damien Luviano
50 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


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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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Can the drug hydroxycholoroquine also cause color blindness?

Yes 1st sign: When used in high doses as in treatment of malaria vision damage is frequent but in doses for lupus etc this is rare but color vision loss can be an early sign well before visual acuity damage. Reversal of damage can occur if stopped early. ...Read more

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No one in my family has the gene that causes color blindness and yet I have it. How is this possible?

No one in my family has the gene that causes color blindness and yet I have it. How is this possible?

X-linked: The most common colorblindedness is an x-linked trait. That means it occurs almost exclusively in males and is passed to them from a defect x from their mothers. Your mother could have gotten this gene from her mother. In this case, there would be no relatives with it. Ps. Ask your mother's father if he is color-blind. ...Read more

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Why am i color blind? What is the cause of color blindness? No one in my family has the gene that causes color blindness.

Blame your Mom: If you have red-green color deficiency, then you carry a defective x-chromosome which you got from your mom (i assume you are a male). Your mom was a carrier so she was color normal and you had a 50% chance of getting the abnormal x from her. So in fact someone in your family, mom, had the gene. ...Read more

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How long does it take to regain color vision after stopping medication that was causing color blindness?

How long does it take to regain color vision after stopping medication that was causing color blindness?

Color blindness: The color hue from certain medications should reverse with stopping that medicine. There are some medications that if the color vision has been affected then the damage is done and not reversible. The color vision defect with these is more advanced. ...Read more

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Can looking directly at the sun cause someone to go color blind?

No: This is definitely not recommended. It is uncomfortable and most would not due it. It sometimes is done for religious purposes and by people under "the influence". The eyes focuses the sunlight and damages a portion of the retina where it is focused in a non-specific way so all receptors are damaged and color blindness does not result, just a loss of a portion of the visual field. ...Read more

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What color blindness causes you to see black as red?

There is none: You can have colour blindness when you see red as black, but not black as red. ...Read more

Dr. Lawrence Kale
99 doctors shared insights

Color Blindness (Definition)

Color blindness is a condition where an individual has a decreased ability or complete inability to detect differences between various colors. For example, red-green color blindness is the inability to distinguish between ...Read more


Dr. David Chandler
75 doctors shared insights

Color Blind (Definition)

Color differentiation difficulties are where a person has trouble distinguishing the difference between certain colors. One of the most common difficulties involves difficulty telling apart the ...Read more