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How Can You Get Color Blindness If Neither Parent Has It
Trauma: Color blindness can be acquired (rarely) by trauma to the brain or trauma to the retina of the eye. It can also come from degenerative diseases that affect the retina, like macular degeneration as well as metabolic diseases, like diabetes. Another possible cause is vitamin a deficiency. ...Read moreSee 1 more doctor answer
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
Other diseases: While the typical types of color deficiency are due to an inheritance through the genes, color deficiency can occur from inherited retinal diseases like retinitis pigmentosa, diffuse retinal damage such as advanced diabetic retinopathy and a few rare individuals with a stroke in the color perceptive part of the brain which can eliminate color recognition. ...Read more
Can people be born without color blindness then get when they get older. I know that people with good vision can go bad, is it the same thing?
Yes: One-third to one-half of males with a new diagnosis of hemophilia have no family history of the disease. This can be due to a number of possibilities (most too complicated to be discussed here), but new mutations (de novo mutations) can occur in the offspring. For a good review of this topic, see http://www.Ncbi.Nlm.Nih.Gov/books/nbk1404/. ...Read moreSee 1 more doctor answer
Who said so ?: Children under school age do not all have the level of understanding to do the standard ishihara plates to screen for color deficiencies.Those that are older do. It is available (i can do it ) but seldom requested. I don't believe i've had more than 1 or 2 requests in 3 decades. ...Read more
Why not: Color deficiency, usually in males, is because of a defect on the sex chromosome (the x) which is unchecked by the y (male) chromosome. If you have this, none of your children will be color deficient because your male children get a y from you and your deficient x goes to your daughter whose mother is undoubtedly color normal. Color deficiency is not a particularly big handicap anyway. ...Read moreSee 1 more doctor answer
Uncommon unless....: Rp is a genetic disease. You are not likely to get it unless you inherited the defective genes from one or both parents. If you have other siblings with rp, then you may be at risk. If this is the case, then you should get get examined by the same specialist. ...Read moreSee 1 more doctor answer
If you attract herpes do the person you get it from has to have an outbreak and how long does it take for it to appear on you ?
4 days: Incubation period (time from getting infected to appearance of symptoms) is about 4 days. Transmission most commonly occurs from an infected partner who does not have a visible sore and may not know that he or she is infected. After infection, a woman may not develop symptoms and never know that she has been infected. ...Read moreSee 1 more doctor answer
Depression: Depression is due to a combination of genetic vulnerability and environmental influence. Studies show increased incidence in monozygotic twins, and that vulnerability to depression is more heritable in women than men. http://www.ncbi.nlm.nih.gov/pubmed?term=16390897 prolonged sad mood, loss of interest, and changes in energy, sleep, and appetite are some symptoms of depression. ...Read more
Testing: The most common type of "color blindness" is red-green color deficiency. Blue-yellow deficiency or true color blindness (achromatopsia) are rare. Color testing can identify which. The problem is a lack of certain types of cones or their opsins (light-sensitive compounds). Red-green deficiency can be adapted to fairly easily and is not very limiting, but the others can significantly impact vision. ...Read moreSee 1 more doctor answer
Not Exactly: What is passed genetically from parent to child is the propensity to develop atopy (such as eczema, asthma, allergic rhinitis, food allergies) but usually not sensitization to specific allergens which the parent is allergic to. The exception, which is a controversial topic, is drug allergies, but this is usually dependent on metabolism of the drug which is inherited rather than the allergy. ...Read moreSee 1 more doctor answer
The transplant team: notified, and places all corneas and other organs that are donated on ice to keep it viable for the patients who will be needing it from the transplant bank. It's done sterile in the OR, and quickly, as soon as the person has passed. Then, when the tissue is needed for transplanting this is all coordinated beforehand so it's available when the corneal transplant surgery takes place. ...Read more
What can you do if a child has a deformity that can be corrected with surgery, but his parents can't afford it?
What does a positive M.urealyticum result mean? Does this need to be treated if no symptoms? Does it pose risk to babies if mother has the infection?
Normal bacteria: Ureaplasma urealyticum is enitrely normal in the female genital tract. At any point in time, it can be found in about half of all healthy women. There is no risk to babies in the uterus or during delivery. Some strains sometimes cause nongonococcal urethritis (NGU) in men, but even in men most UU is entirely normal. Most STD experts never even test for it. No treatment is needed. ...Read more
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
Loss of vision reflects the inability to perceive images. Such a phenotype can be due to occlusive or barriers to light (e.g. cataracts) through retinal alterations (e.g. wet macular degeneration) to optic nerve lesions (e.g. from a pituitary adenoma) to central nervous system ...Read more
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