Color vision deficiency, or color blindness, is an incurable condition in which the affected person cannot distinguish one or more colors from one another. This deficiency is more common than you might believe: It affects 8 percent of boys and 0.5...
Each cell within the human body contains thousands of genes, which collectively make up the genome. The genes are arranged in larger groupings, called chromosomes, and most cells within the human body contain a pair of 23 different chromosomes,...
People with color blindness aren't blind in any way--they just have trouble distinguishing between certain color groups. Most color blind people do see colors---they just don't see them in the same way that other people see them. Color blind...
Being blind generally refers to a complete lack of functional vision. However, blindness involves varying levels of vision ability, sometimes under varying conditions. Vision is the result of light rays hitting the back of the eye, or retina, and...
The human genome--the whole of a person's DNA--contains thousands of genes. Each person has two copies of most genes, called alleles, with one allele inherited from the mother and one from the father. During development and throughout life, the...
Multiple sclerosis (MS) is a chronic medical condition that causes the progressive destruction of myelin---a type of tissue that protects the nerves that run throughout the central nervous system. An estimated 400,000 people in the United States...
Multiple sclerosis typically appears from the ages of 20 to 40. Women experience multiple sclerosis more than men. This disease involves malfunction of the central nervous system. The communication system between the brain and various areas of the...
Glaucoma is a condition affecting the eye that generally results in an increase of pressure in the eyeball that often ends in blindness. Certain Chinese herbs may help reduce pressure and resolve some of the symptoms associated with glaucoma;...
Vitamins are essential micronutrients necessary for specific metabolic functions in the body. In 1941, the National Academy of Sciences published the Recommended Daily Allowance, or RDA, for vitamins. The RDA is a determination of the healthy...
Multiple sclerosis, or MS, refers to the many areas of scarring that result from the destruction of the tissues that wrap around nerves. The tissues that surround the nerves facilitate the transmission of electrochemical messages between the...
Calcium and magnesium are classified as macrominerals because your body requires fairly large quantities, while zinc is a micromineral and smaller amounts are needed. Minerals are a crucial part of a healthy and varied diet, but deficiencies can...
Atrovent, sold under the generic name ipratropium, is a medication used to prevent bronchospastic (a condition in which your airways suddenly constrict) episodes in people who suffer from such lung diseases as emphysema or bronchitis, says...
People who are colorblind are unable to see certain colors normally, according to the online medical encyclopedia MedlinePlus. There are several different types of color blindness, which vary based on the colors that are undetectable and the...
Certain signs and symptoms of vitamin deficiencies are often passed off as a stomach upset, a cold, infection or just being tired or rundown. Depending on how long you have been deficient, often taking a supplement can correct the problem. Consult...
Multiple sclerosis (MS) is a complex neurological condition that is difficult to diagnose. Some patients go for years before a diagnosis is confirmed. The nerves that carry signals throughout your body are protected by a fatty covering called...
Bright and glossy red peppers are pretty enough to put in a centerpiece bowl. Put some on your plate and you'll also benefit from their nutrition, including an abundance of vitamins A and C. Red bell peppers are mature versions of green bell...
Carotenoids are yellow, red and orange pigments found in plants. Lutein, a type of carotenoid found in large quantities within tissues in the eye may have value in treating age-related macular degeneration and cataracts, two of the largest causes...
Just like the rest of the body, the eyes require certain nutrients to function normally and to prevent diseases of the eye that can cause blindness. Factors such as age and exposure to sunlight can lead to a degradation of eye health. Certain...
Diabetic retinopathy is a complication of type 1 diabetes or type 2 diabetes that causes damage to the retina eye. This can eventually lead to blindness. The condition is accompanied by symptoms such as blurred vision, dark or empty areas in your...
Color blindness is a visual deficiency that is characterized by the inability to see certain colors. To understand how this condition affects the eye, it is necessary to understand how the eye perceives color. The eye operates like a camera with...
With the discovery of vitamin A in the early 1900s, researchers began to learn about the roles that organic substance plays in supporting bodily functions. Through the next 40 years, doctors discovered all of the vitamins essential to life....
More than 10 million people in North America are visually impaired, according to the American Foundation for the Blind. These people learn to live independently and productively, as well as enjoy leisure activities that keep them entertained and...
If you are concerned about your kids growing up among a nation of couch potatoes with nature deficit disorder, what better way to combat the problem than by getting your kids exercising outside? Just don't use the word exercise Before the age of...
You've probably encountered many products containing sodium metabisulfite without even realizing it. Sodium metabisulfite preserves food and is used extensively in commercial wine making. It is a bleaching agent in the textile, pulp and paper...
For children who are color-blind, red, orange, yellow and green may be different names for what they perceive as the same color. Children who are color-blind can see color, just not the same colors as people with normal vision. The American...
Clotrimazole is an anti-fungal medication used to treat yeast infections of the vagina, skin and mouth, says MedlinePlus. Clotrimazole is available as a cream, solution, lotion or lozenge that should be taken as your doctor prescribes. Failure to...
The majority of sinus infections are annoying and effectively treated with antibiotics or natural therapies. Other sinus infections can have serious consequences that can turn into life threatening conditions, according to the American Rhinologic...
Red ginseng, also known as Panax ginseng and Asian or Korean ginseng, is a root grown for its medicinal properties. Red ginseng is available as an extract or in pill and capsule form. This supplement is not advised for children or individuals...
Resveratrol, a natural antioxidant, is derived from grapes, peanuts and some berries. A great deal of research at Harvard University has identified resveratrol as an anti-aging compound. It prolongs lifespan and delays the onset of several...
