Posts Tagged ‘macular’
Found in the macula, the macular pigment (MP) consists of two pigments or carotenoids: lutein and zeaxanthin. MP is most dense in the center of the macula named fovea. Moreover, these two pigments have different concentration is different parts of the eye. Lutein makes up 67% or greater of the MP in the peripheral retina. But in the central macula, zeaxanthin is the majority that it accounts for up to 75% of the MP.
MP in the eyes can protect them from harmful effects or free radicals caused by excessive exposure to UV rays and blue light. In detail, the two pigments of MP can help prevent age-related macular degeneration. In general, there are two ways to get enough lutein and zeaxanthin. A balanced diet with plenty of green vegetables and fruits as well as dietary supplements of the two nutrients can both offer enough MP.
As supplements are one of the main sources of MP, there are many studies focusing on these supplements as well as their effects. One study named enhancement of macular pigment density by oral lutein supplement (EMPOLS) conducted by researchers in Berne, Switzerland evaluates the relation between MP density and intake of supplements containing lutein. Participants of this study consume 10mg of lutein supplement product labeled VitaluxPlus on a daily basis.
Another observation study named the role of macular pigment in patients with age-related macular degeneration is also being carried out in Switzerland. Expected to complete in December 2009, this study has several purposes. First one is to assess how MP density and its distribution are associated with age-related macular degeneration. A second aim is to identify patients with low MP density. The study is still supposed to improve the early diagnosis of patients susceptible to AMD. Since low MP values are high risks of AMD, the observation study will develop a basis for dietary supplementation of lutein and zeaxanthin.
A balanced diet beneficial to eye health should contain many foods. Lutein is one of the critical elements. Many sources are rich in lutein, including corn, eggs, spinach, carrots, cantaloupe, oranges, red and orange peppers, kale, and collard greens and so on. In order to facilitate the absorption of lutein through the digestive tract, it is also necessary to eat some healthy fat in combination with those raw vegetables.
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Firmoo.com is the emerging online optical store selling high quality eyewear, such as prescription eyeglasses (single vision myopic glasses, reading glasses, bifocal and progressive eyeglasses etc.,), prescription sunglasses (with RX tinted lenses), prescription sports goggles. Firmoo guarantees lowest possible price in the market. Firmoo’s return and refund policy makes any purchase risk-free ones.
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Lutein is one of the carotenoids that are found in many plants and animals. Other pigments in the same family include zeaxanthin, astaxanthin, lycopene, beta-carotene and alpha-carotene. Although lutein and zeaxanthin are most commonly thought to benefit the eyes, other pigments also have antioxidant activity in the human body.
During the past several years, most eye doctors or nutritionists recommended a single-ingredient lutein supplement. They think this kind of supplement is beneficial to the eyes, because lutein is most highly concentrated in the retina. And some lutein supplement promoters are airing ads on television. But latest studies have shown other results.
It is true that some earlier studies have proved the effectiveness of lutein supplement or the combination of lutein and zeaxanthin. These nutrients alone can reduce the risk of developing age-related macular degeneration. These studies have considerably promoted the prevalence of lutein supplements.
However, a recent study revealed something different. It compared the blood level of various antioxidants in people with and without macular degeneration. Researchers found that people with high levels did not have macular degeneration. The result is that the total blood levels of carotenoids offer proper protection against the disease.
Supplement products on the market are quire disappointing. A shocking fact is that some lutein supplements as well as vitamins are synthetic. These vitamins can be basically plastic. In particular, most commercial lutein products at low prices are synthetic.
As mentioned before, astaxanthin is another less common antioxidant associated with macular degeneration prevention. A wholesaler of natural astaxanthin named ALGA technologies reveals that nearly all commercial astaxanthin is made of petrochemical sources synthetically.
There is no doubt that these synthetic chemicals have no benefit to human body. But many customers are told to take these supplements on a daily basis. They believe that these lutein supplements as well as multi-vitamins are good for their health. In conclusion, natural sources of these nutrients should be chosen.
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Firmoo.com is the emerging online optical store selling high quality eyewear, such as prescription eyeglasses (single vision myopic glasses, reading glasses, bifocal and progressive eyeglasses etc.,), prescription sunglasses (with RX tinted lenses), prescription sports goggles. Firmoo guarantees lowest possible price in the market. Firmoo’s return and refund policy makes any purchase risk-free ones.
Article Source:http://www.articlesbase.com/vision-articles/natural-nutrients-sources-are-better-1534260.html
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Healthy vision or good eyesight requires certain nutrients from a healthy diet or eye supplements. The Dietary Guidelines for Americans recommends that a healthy diet should emphasize fruits, vegetables, whole grains and fat-free or low-fat milk and milk products. It should also include lean meats, poultry, fish, beans, eggs and nuts. In fact, many Americans take a diet that is high in calorie but low in nutrient. A healthy diet should still low in saturated fats, trans fats, cholesterol, salt and added sugars. If your diet is not healthy enough, multivitamins and mineral supplements can offer enough nutrients that your eyes needs.
These supplements protect you from degenerative eye diseases such as macular degeneration and cataracts. The Age-Related Eye Disease Study (AREDS) investigated the natural history and risk factors of macular degeneration and cataracts and evaluated the effect of high doses of antioxidants zinc on the two diseases’ progression in the 1990s. AREDS recommended a formula that can significantly reduce the risk of advanced macular degeneration. The formula contains Vitamin C, E and A, Zinc and copper. AREDS also found that antioxidant eye vitamins can decrease the risk of developing cataracts. A follow-up study named AREDS2 aim at evaluating the effects of other nutrients such as lutein, zeaxanthin and omega-3 fatty acids.
In detail, vision multivitamins should contain certain ingredients. These elements are essential in preventing the deterioration of degenerative eye diseases. Vitamins A helps maintain night vision and heal wounds. Vitamin B complex including B1, B2, B3, B5, B6, and B12 helps decrease chronic inflammation and prevent macular degeneration as well as treat uveitis. Vitamin C and E are also included by the AREDS formula. Lutein and zeaxanthin may also play a role in reducing macular degeneration and cataracts. While phytochemical antioxidants protect eyes from oxidative stress, omega-3 essential fatty acids have been proved to lower the incidence of developing dry eye.
Among various multivitamins solutions, popular brands such as ICaps, Ocuvite PreserVision, Oculaire and MacuTrition are more convincing. Some tips are important when you choose multivitamins. You should check the expiration date and the bottle seal. Doses are also critical that you must strictly follow the dosage instructions on the bottle. Supplements that contain filters such as dairy products, corn and wheat are not suitable for people with allergies. High bioavailability enables your body to absorb nutrients more easily. And capsules are also easier for absorption than hard tablets.
You should also be aware of safety issues while taking eye supplements. Pregnant and nursing individuals need additional care.
this article is come from:http://vision.firmoo.com/others/eye-supplements-for-healthy-vision.html
Vision Library
is the information source in area of vision care, including eyeglasses, sunglasses, contact lenses, sports protective eyewear, vision error and diseases, vision surgery, ageing and kid’s vision etc., solely sponsored by Firmoo.com, an emerging online optical store.
Article Source:http://www.articlesbase.com/vision-articles/eye-supplements-for-healthy-vision-1318058.html
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Healthy vision or good eyesight requires certain nutrients from a healthy diet or eye supplements. The Dietary Guidelines for Americans recommends that a healthy diet should emphasize fruits, vegetables, whole grains and fat-free or low-fat milk and milk products. It should also include lean meats, poultry, fish, beans, eggs and nuts. In fact, many Americans take a diet that is high in calorie but low in nutrient. A healthy diet should still low in saturated fats, trans fats, cholesterol, salt and added sugars. If your diet is not healthy enough, multivitamins and mineral supplements can offer enough nutrients that your eyes needs.
These supplements protect you from degenerative eye diseases such as macular degeneration and cataracts. The Age-Related Eye Disease Study (AREDS) investigated the natural history and risk factors of macular degeneration and cataracts and evaluated the effect of high doses of antioxidants zinc on the two diseases’ progression in the 1990s. AREDS recommended a formula that can significantly reduce the risk of advanced macular degeneration. The formula contains Vitamin C, E and A, Zinc and copper. AREDS also found that antioxidant eye vitamins can decrease the risk of developing cataracts. A follow-up study named AREDS2 aim at evaluating the effects of other nutrients such as lutein, zeaxanthin and omega-3 fatty acids.
In detail, vision multivitamins should contain certain ingredients. These elements are essential in preventing the deterioration of degenerative eye diseases. Vitamins A helps maintain night vision and heal wounds. Vitamin B complex including B1, B2, B3, B5, B6, and B12 helps decrease chronic inflammation and prevent macular degeneration as well as treat uveitis. Vitamin C and E are also included by the AREDS formula. Lutein and zeaxanthin may also play a role in reducing macular degeneration and cataracts. While phytochemical antioxidants protect eyes from oxidative stress, omega-3 essential fatty acids have been proved to lower the incidence of developing dry eye.
Among various multivitamins solutions, popular brands such as ICaps, Ocuvite PreserVision, Oculaire and MacuTrition are more convincing. Some tips are important when you choose multivitamins. You should check the expiration date and the bottle seal. Doses are also critical that you must strictly follow the dosage instructions on the bottle. Supplements that contain filters such as dairy products, corn and wheat are not suitable for people with allergies. High bioavailability enables your body to absorb nutrients more easily. And capsules are also easier for absorption than hard tablets.
You should also be aware of safety issues while taking eye supplements. Pregnant and nursing individuals need additional care.
this article is come from:http://vision.firmoo.com/others/eye-supplements-for-healthy-vision.html
Vision Library
is the information source in area of vision care, including eyeglasses, sunglasses, contact lenses, sports protective eyewear, vision error and diseases, vision surgery, ageing and kid’s vision etc., solely sponsored by Firmoo.com, an emerging online optical store.
Article Source:http://www.articlesbase.com/vision-articles/eye-supplements-for-healthy-vision-1317993.html
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Just as the name reflects, age-related macular degeneration (AMD) has been a severe eye disease among people over 65. The estimated number of AMD affected Americans is 3 million by 2020. As a part of the retina, macula is responsible for sharp and central vision, so that AMD may lead to vision loss.
There are generally two types: dry AMD and wet AMD, the former of which accounts for about 85-90 percent. Obvious symptoms of dry AMD include yellowish spots from deposits or debris from deteriorating tissue around the macula. Both macular tissue aging and thinning and pigment depositing can lead to dry AMD. Studies show that vitamin A, C and E may help prevent or slow progression of dry AMD. Dry AMD patients are also advised to wear sunglasses when outdoors. People with wet AMD have more severe problems: new blood vessels grow beneath the retina and leak blood and fluid, which damage light-sensitive retinal cells. Wet AMD is caused by the body’s misguided attempt to supply more nutrients and oxygen to the retina, which instead causes scarring and potential vision loss. Occult wet AMD has light blood leakage and less vision loss danger, while classic wet AMD has clear scarring and more vision loss danger.
If you have AMD, your central vision has shadowy areas. During a retinal exam, the doctor may detect early signs of AMD and then an Amsler grid can be used to measure your central vision. For a further affirmation, your retinal blood vessels surrounding the macula will be examined. Many researches have showed that macular degeneration is mostly caused by aging and eye tissue deterioration. Other confirmed or potential risk factors for AMD include drug side effects, smoking, family ADM history, high blood pressure, lighter eye color, obesity, over-exposure to UV lights, fat diet and so on.
AMD-affected people in their 90 develop vision loss at a possibility that is 15 times of that for people in their 60s. And overweight patients have a risk of advanced ADM that is double of that for people with normal body weight. Gene variants are also related to AMD, which is known as family disease. Smoking is reported to bring higher rates of vision loss on ADM patients. AMD occurs more frequently in whites, so that people with lighter eye color are suspected to suffer AMD at a higher incidence. Toxic drugs such as Aralen and phenothiazine may cause side effects that lead to AMD.
Currently, no outright cure is available for AMD. For dry AMD, FDA has never approved any treatment, although nutritional intervention may slow its progression. Those nutrients include zinc, lutein, zeaxanthin and vitamin A, C, and E. For wet AMD, FDA has approved drugs including Lucentis, Macugen and Visudyne to stop or slow abnormal blood vessel growth.
Since complete recovery from vision loss caused by ADM is impossible, regular Amsler grid tests are useful to detect underlying AMD risk. For people with vision loss, many low vision devices such as magnifying glasses are available.
this article is come from: http://vision.firmoo.com/eye-diseases/causes-and-treatments-for-macular-degeneration.html
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