Posts Tagged ‘radiation’

Ways to prevent cataracts formation

Astronauts receive higher daily dose of radiation, especially on a long mission such as the future Mars flight. As a result, cataracts may occur more frequently in these professionals. Currently, NASA and the National Eye Institute have been cooperating in developing a non-invasive instrument that can be used to detect very early signs of cataracts and monitor any progression.

The Alpha crystalline proteins in the lens are thought to help the lens maintain its refractive index, which allows the lens to focus light on the retina and offer clear vision. Oxidative stress may cause some proteins to break down in the lens, resulting in damaged proteins. Once these damaged proteins and other damaged cellular substances are crossly linked, they can lead to large clumps and form opacity in the lens. This opacity can gradually interfere the eyesight when they grow large enough and become cataracts.

This new instrument is supposed to evaluate the function of Alpha crystalline proteins and measure their levels as well as changes. Originally developed for space program, this measurement method can now be used to detect early signs of protein damage caused by oxidative stress. Age-related cataract, diabetes, and some neurological diseases are closed associated with oxidative stress.

Oxidative stress can be caused by UV radiation, drugs, chemicals, smoking, dietary components as well as other environmental factors. Alpha crystalline proteins in normal level can prevent these damage proteins from aggregating into clumps. However, Alpha crystalline level will be lowered due to natural aging. As a result, cataracts may develop.

As mentioned before, oxidative stress is the original cause in the lens of cataract formation. Currently, antioxidants are widely accepted to prevent cataracts, although their capacity is also unclear. In detail, lutein and zeaxanthin are two of the antioxidants that can reduce the incidence of cataract formation. A daily supplement containing antioxidants is helpful in preventing cataracts formation. These antioxidants can be gained from vegetables and fruits.

People should also control some risk factors such as smoking, obesity and eating a diet high in refined food with high sugar content. Smoking is believed to systemically decrease antioxidants in the body. Some experts also think that visible blue light can cause oxidative damage in the retina. UV protection by wearing sunglasses or UV-blocking contact lenses is also quite necessary.

More related articles:

·Causes for various congenital cataracts

·Cataract surgery preparation and outcome

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/ways-to-prevent-cataracts-formation-1534227.html

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My Miserable Time with Glasses Has Gone

Due to eyeglasses, my life became miserable inch by inch. I assume that most girls with glasses have the same “nightmare” as I do. I have not being exaggerating. It is the fact. In accordance with a survey, over 70% males from fifteen to forty think that girls with glasses are less attractive that those without. Part of the reason is that most “glasses” girls do not have pretty eyes since eyes tend to seem twisted after wearing glasses for years. What’s worse, the nose becomes saddler gradually. If they want their noble noses back, the most effective choice is plastic surgery, which would undertake much risk and cost much money. Soon the contact lens appeared due to the development of science and technology, which have made millions of people drop their rimless eyeglass frames to be their selves, but it was still not marvellous antidote for those like me, who already have twisted eyes because of wearing it over 3 years and who are afraid of taking off the glasses on account of their eyes turning sightless and languid, a little scary, to some degree.

In this case, there are not many options left for me. I definitely need a new one, a lighter one with more functions including radiation resistant, dust prevention etc. Searching on Internet for a few hours, I found my preferable one on a website www.Firmoo.com. The biggest feature of the glasses is being light in weight. Usually a pair of glasses without metal frame is about 40 grams while this one made from a kind of special raw material is about 15 grams. All the glasses on this website are made from this material, which can resist not only dust but also radiation from computer and the spicy sun. Moreover, the human-oriented design of the supporting point on the nose bridge is very creative in a bid to make the nose under less pressure. Therefore my big problem has been solved.

Besides, many websites tells me that with proper eyeglasses and eye care, serving life of a pair of glasses can be very long, which surprises me a lot as I barely pay any heed to eyeglasses care and I go to get a new pair glasses every three month on average, mainly owing to abrasion. I’m also told that by doing eye exercise recommended and conducted by on-line ophthalmologist, the appearance of my twisted eyes can be improved a lot. I’m really happy and grateful because apart from a pair of ideal glasses, I have gained so much knowledge about glasses and eye care from that these websites.

Nowadays, for the glasses with the weight as a feather, the eyeglasses care and eye exercise, my miserable life has gone and I enjoy my easy life very much.

Firmoo’s Blog 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 offering high quality eyewear at the lowest prices.Firmoo’s return and refund policy make any purchase risk-free.

Article Source:http://www.articlesbase.com/vision-articles/my-miserable-time-with-glasses-has-gone-1510640.html

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Protecting Your Eyes

With the development of economic and science, competition is becoming fiercer and fiercer and people’s pressure is stronger and stronger. In order to face these competitions and pressures, people are working harder and harder and students are studying more and more diligently. As a serious result of this, more and more people are becoming shortsighted.

Here I want to give some suggestions to those who are lucky enough to have good eyesight. And I hope they can protect their eyes well.

  1. Even if your work or study is very hectic, you should make good use of your limited time to give your eyes a relaxation. You can do eye exercise and do facial massage. Or you can watch something from a long distance.
  2. Don’t stay for a long time in front of the computer. And you might as well give your computer some ant radiation equipment, such as a diaphragm which can reduce and absorb radiation.
  3. Pay attention to your diet. Try to develop a healthy habit of diet. You can eat some internal organs of animals for these things can help you protect your eyes.
  4. Neither read under strong sunlight, nor under dim light. You shouldn’t read while lying on bed. A good habit of reading is very important if you want to keep your eyes healthy.
  5. Keeping your eyes clean is also necessary. Don’t let any dirty things going into your eyes. Even if some dirt goes into your eyes, you mustn’t use your hands to rub them.

Please remember only if you pay attention to your habit of using eyes in daily life, you may have good eyesight.

For those people who have already been shortsighted, I want to say that if you are wearing a pair of eyeglasses, you must choose your glasses carefully. A good pair of glasses can not only help you see things clearly, but also can give you a great hand to protect your eyes.

I am also shortsighted, and I recently have changed a new pair of glasses which was bought online. Glasses there have high qualities but are at low price. You can go Glassesshop and have a look.

Have been specialized in glasses for many years
Especially be expert at glasses
Now supply prescription sunglasses for summer special
Aim to assist all people with poor vision

Article Source:http://www.articlesbase.com/vision-articles/protecting-your-eyes-1108208.html

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