There is a “camera” in eye and they work almost the same as real camera. Eye has pupil, retina that equal some particular parts of camera. The pictures captured by eye will be quickly transferred to brain through optic nerves and people can see the objects as a result.

In fact, the working mechanism of eyes is very complex and is out of people’s imagination. Eye is composed of some vital optic nerves, muscles, glands, etc.

As for glands in eyes, they are used to protect organs. They will help eyes to run quickly and drain out some wastes and harmful substances that may damage eyes. Anyway, eye are very fragile and in need of great care.

However, eyes are prone to many problems and many people have bothered by them. In fact, eye problems are in most cases irreversible. Luckily, there are some methods to prevent them. For example, regular eye examinations can help avoid many problems; good and balanced diet can also assure eye health. Generally, eye examinations can help predict any sort of potential diseases, too. Some people have to go blind by glaucoma and cataract, for they have never done such examinations. However, such misfortunate can be avoided if detected earlier.

People with hyperopia can not see objects nearby, for there are some refractive errors in their eyes. On the contrary, people with myopia can not see objects afar. And there are also many other horrible eye diseases. For example, people may suffer from presbyopia when they are over forty. This is an aging process in eyes. Luckily, bifocals can be used to treat it.

Therefore, before any serious damage occurs, those problems must be treated immediately and effectively. Some important and crucial information about eyes can be obtained from some particular websites, including lenses, glasses, eye surgeries, etc. In addition, some very important information about the latest laser technologies can also be obtained here.

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First, adequate nutrition is essential to keep our eyes health. The nutrition consists of vitamins, minerals and green leafy vegetables. The following will introduce where to get these nutrition. It is researched vitamin A, C, E and antioxidants are helpful for eyes health, which can be got from orange, kiwi, carrots and grapes. And people can also choose to eat green leafy vegetables such as spinach, green peas, French beans, lettuce and so on to improve their eyesight. Besides, certain intake of minerals can reduce the damage to the eye and possibility of age-related problems.

For other nutrients which are beneficial for good eye care, you can follow the below points: First, it is better to take in omega-3 fatty acids in the diet to get rid of saturated fats. Second, for obese people, who have high possibility of diabetes-related eye problems, they can take in the supplement of aloe vera to increase their immunity ability and avoid infection. Third, vitamin B-12 is also helpful for eye health as red blood cells will be generated to keep good functioning of the brain and nervous system. Fourth, some herbs also have a good effect on good eye care. For example, bilberry extract is good for eye nerve cells, with which the eye health and vision can be improved. And mohania grape extract has some good function on people’s retina. In addition, if you want to have a good eyesight or keep good eye health, please make sure not smoke as smoking can damage the soft tissues of the eye.

Besides intake of nutrition, regular eye practice also plays an important role in keeping good eye health. The following will introduce several simple eye exercises: First is blinking eyes at least 15 times per minute, which can help eye lubrication and cleansing, reduce eye tension as well. The second exercise is to exercise our eye rotation ability. You can move your eyes up, down, left and right. 30 times of this exercise will be good for eye muscle power. Third exercise is to hold a pen at a foot distance, and then concentrate your eyes on the pen, and then move the pen to further distance, during the whole process, make your eyes concentrating on the pen, the aim of which is to improve the concentration ability. Fourth, in order to reduce the eye tension, you can blink the eyes rapidly for 20 times.

Besides, the proper protection of our eyes from helpful rays is also beneficial for our eye health. Whenever you are exposed to harmful rays, like UVA and UVB rays, make sure to wear sunglasses to protect the eyes.

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In some cases, maintaining body fitness also helps the eyes keep healthy. Body health generally improves oxygen levels in the eyes. Moreover, regular participants in outdoor activities are believed to suffer myopia at a much lower risk, because they frequently focus at long distance objects.

However, general body health is inadequate to maintain eye fitness. Special ways that directly target at the eyes are needed. The most basic requirement is to receive routine eye checkups. This is quite necessary in order to preserve the eyesight and general ocular health. Regular eye exams from an optician or optometrist are critical in detecting visual problems.

A well balanced diet is beneficial to not only one’s general health, but also eye health. Leafy vegetables and fruits have plentiful of carotenoids that are essential to maintain macular health. These nutrients can effectively prevent various macular problems.

Supplements can also provide adequate carotenoids if a person can not consume enough fruits and vegetables. Common ingredients of supplements include antioxidants, zinc, selenium, vitamin A, B, C and E, lutein as well as zeaxanthin. Mucus that keeps the conjunctiva health can be encouraged by selenium and antioxidants vitamins. And macular degeneration prevention can benefit from antioxidants and zinc. In addition, lutein and zeaxanthin are responsible for absorbing blue light. Blue rays can damage the retina which is the light sensitive layer of the eyes.

Smoking is considered to be harmful to eye health. This addictive habit is a factor in macular degeneration. Age-related macular degeneration usually affects central vision and causes vision loss. Moreover, smoking is also reported to increase the risk of developing cataracts.

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Taking good care of the eyes and preventing eye problems and diseases involve many aspects. One important element is nutrition. Many professional researchers in the world have pointed out that nutrient deficiencies can lead to unnecessary eye infections as well as other conditions. Among various nutrients, lutein is a powerful one that is closely related with the eyes.

In fact, the macula in the retina contains much lutein naturally. And many studies have shown that lutein deficiency is a major factor of age related eye problems including macular degeneration. Ophthalmologists strongly recommend individuals to include lutein in daily foods, in order to protect the macula responsible for central vision. Regular foods that should be included in the diet contain broccoli, Brussels sprouts, corn, eggs, spinach and so on. These foods are actually best sources to get natural substances including lutein.

But in most cases, people can not get adequate nutrients by simply relying on daily foods. As a result, other sources are needed. Nutritional supplements on the market are another good alternative. These supplements can help people take necessary ingredients that the body needs. Nowadays, there are rows and rows of bottles of supplements in big health food stores. In other words, nutritional supplements come in a great variety of brands and formulas.

The key point is how to choose a right one. The first task for customers is to find out where the raw ingredients come from. Only natural ingredients can be most effective in maintaining healthy eyes. A second consideration can be given to the manufacturers. Notable brands are more trustable. In addition, it is a necessity for customers to ask for the certification of a supplement product.

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It is a good habit to receive eye examinations at regular interval. This is because our eyes are prone to many diseases, in particular when we age. Some professors have suggested that eye test for glaucoma should be at least once a year, though some of us hate this process. Anyway, prevention is better than treatment.

Why should we prevent this problem? This is because our vision will get lost permanently once any damage happened to the optic nerves. So regular eye examinations are necessary and essential. Usually, the damaging process of optic nerves is very slow and can not be detected easily. Once it is detected, the damage is irreversible.

Pressure and lack of blood for optic nerve fibers can lead to glaucoma. Sufferers of glaucoma may have different feelings and reactions towards this problem. Theoretically, people of any age group may suffer from glaucoma, but aged people run much higher risk.

Some data has also disclosed that glaucoma can also be inherited. Therefore, people with such family history run much higher risk of getting glaucoma. And people of this group should pay more attention to regular examinations. Remember, once the damage occurred, it can not be recovered.

In the process of aging, our organs begin to degenerate, eye is no exception. Thus, we should take regular eye examine. Moreover, eye is very sensitive and may be prone to many problems. Be serious about this. If we have any worry about this, we can visit and consult with eye doctors.

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Some studies have discloses that the population of eye problem-struck people will be over 50million within 10years. In particular, people who are over 65 run much higher risk of getting those problems. And over half of those who are over 80 will become blind.

Generally, eye problems will lead to vision decline and some symptoms will also arise in the meantime. Cataracts, eye infections, redness, etc. are some of the commonest eye problems.

Fortunately, with the development in the field of eye health, more and more people have noticed the important relation between eye health and nutrition. And some nutritional foods and supplements are brought to the market. In addition to those well-known nutrients that can help enhance people’s vision, some other new nutrients have also been found, such as lutein, zexanthin, etc. And all those new nutrients are helpful for people’s eye health.

Lutein can be found in some leafy vegetables. And it is an inborn part of macula. This nutrient is believed to be able to filter out any harmful radiations from the sunlight.

Macular is a vital part of eyes and it plays crucial role in maintaining people’s vision.

In addition to lutien, zexanthin is another new nutrient that is also very important for people’s eye health.

Some studies have disclosed that harmful rays, like UV radiation, are some of the major causes for cataracts. And lutein and zexanthin are just the important substances that can help block out such rays. To some extent, the two nutrients are much effective in preventing people’s vision from being injured by UV rays than other known nutrients, like Vitamin E.

Other studies have also proved that lutein and zexanthin are also important for eye health. And in some experiments, the two nutrients have showed very strong antioxidant power.

Like lutein and zexanthin, astaxnthin is also another very important nutrient for eye health. It is a very powerful antioxidant and can filter out UV rays.

The way that the three nutrients work can explain how to maintain eye health. Some bad habits or UV rays will cause some free radicals that will lead to oxidation reaction in the eyes.

This oxidation process will lead to great damage to molecule and the lens. Why will some senior citizens have to suffer from blurriness or blindness? This is because the free radicals in the bodies have increased greatly.

Fortunately, the three nutrients can be used to neutralize those free radicals before any damage occurred onto the eyes. Therefore, those nutrients are well known for combating free radicals and protecting eye health.

Those nutrients can be found in many leafy vegetables and other fruits. Generally, eating those foods every day can meet people’s daily demands. Furthermore, eating those foods can also benefit people’s bodies in many other respects.

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Zeaxanthin and lutein can fight off the free radicals caused by harmful rays and medications. The common eye disease age-related macular degeneration is exactly caused by these harmful radicals.

The two nutrients always appear together because they are cooperative. Zeaxanthin can repair and protect the cones in the macula and lutein ensures the well being of the rods which constitute the periphery of the retina. In addition, rods and cones work together and ensure good eyesight. In this case, eyesight may deteriorate if one of the two nutrients goes bad.

Zeaxanthin can be easily found in corn, pepper, saffron as well as other plants. And saffron maintains its characteristic taste and aroma through zeaxanthin. In addition, green leafy vegetables also contain plentiful of zeaxanthin and lutein, so that ordinary people are highly encouraged to eat a diet rich in green vegetables.

Studies show that natural sources of zeaxanthin are always better than those supplement pills. But zeaxanthin and lutein from these natural sources need a long period to build up vital reserves. In an emergency situation, supplements containing zeaxanthin and lutein can offer immediate help. What’s more, some people do not eat healthy foods. For those individuals, supplement pills are especially needed.

Most nutrient experts set the dosage of each zeaxanthin and lutein at about 24 mg each day. With proper dosage, central vision and color perception can be improved.

There are still other nutrients that are indicated to improve eye health, such as vitamin B12 and B2, I-carnosine, anthocyanins, beta-carotene and glucosamine.

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·A Balanced Diet is Essential for Good Eyesight

·Lutein and zeaxanthin for healthy eyes

Macular degeneration mainly comes in two forms. This disease can lead to serious conditions when it advances. But one point is clear that AMD mostly occurs in old people. The study found that antioxidants levels had no direct relation with macular degeneration in young people. The disease in young individuals is probably caused by generics. It is age-related macular degeneration that is closely associated with antioxidant levels.

In addition to lutein, there are many other antioxidants including tocopherol, retinol, beta-cryptoxanthin, alpha and beta carotene, lycopene and zeaxanthin. Lutein has been widely advocated to be beneficial to the eyes. But this study found that only the blood levels of total carotenoids that mattered, rather than the blood level of single lutein. The result showed that the group with AMD had low blood level of total carotenoids.

Actually, other beneficial antioxidants should also be included. And these antioxidants should be taken in different amounts. The mixed amount suggested by experts is 5000IU per day. Lutein does nothing harmful to the health of the body. But lutein alone can not be enough.

One disappointing fact is that many nutrient supplements sold on the market are synthetic. These antioxidants contained in some supplements are not natural ingredients. Antioxidants used by various studies are natural ones. Researchers usually use spinach as a great source of mixed carotenoids. Some other plants and vegetables are also good sources of natural nutrients. On the market, there are all natural multi-nutritional supplements that can be good alternative.

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·AMD treatments that are under trials and researches

·Various ways to prevent AMD

Diabetes is always accompanied by high sugar levels, which may damage the blood vessels of the body, especially those in the eyes. Studies have found that excess amounts of blood sugar caused by diabetes can significantly increase the risk of several eye diseases, including cataracts, blood leakage in the retina, macular edema, macular degeneration, and glaucoma as well as eye infections. Associated with so many possible diseases, diabetes has become a top cause of blindness among US citizens.

Natural aging is inevitable in everyone. Vision loss at different degrees is quite common among old people, especially in those above 50. Vision loss caused by natural aging is always gradual and not noticeable. Yet there are still other health conditions that indirectly or directly affect eyesight in older individuals. Those factors include uncontrolled diabetes, high blood pressure, kidney disease, cataracts, AMD, retinal tears and detachment, glaucoma, diabetic retinopathy as well as presbyopia.

There is a great population of smokers in the world. Unfortunately, most people are not aware of the deleterious effects of smoking on the eyes. Smoking has been thought to increase the risk of macular degeneration and cataracts. This bad habit influences eye health by affecting oxygen level in the ocular tissues. Smoking makes a smoker’s heart to work harder and raise blood pressure, which becomes less efficient in delivering sufficient oxygen to the eyes.

High blood pressure in the eyes can lead to small leaks and clots. Blood leakage in surrounding eye tissues usually affects focus ability. And clots in the eye consume precious oxygen and even cause vision loss. Contributors of high blood pressure include heart disease, diabetes, and unresolved renal disease.

Nutrition also plays an important role in maintaining good eye health. People should regularly consume beneficial nutrients such as anti-oxidants including vitamin A, C and E as well as healthy fats such as omega-3 acids. A lifelong unhealthy diet can speed up aging process.

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Eyewear prescription is just a small portion of an eye exam. Its more significant role is to detect initial signs of eye diseases, preventing them from developing into more severe vision problems. The following two paragraphs is a description of some items for detection.

The first eye condition is refraction error, including myopia, hyperopic and astigmatism, all of which can be corrected using eyewear or refractive surgery. The second item that may be examined is amblyopia, which refers to the uneven development of the two eyes. Once found, amblyopia can be treated by covering the disabled eye, otherwise it will lead to permanent vision loss. A third search may be given to strabismus, which is also known as crossed or turned eyes in brief. People with this disease may have an unperfect eyes alignment, which may affect their depth perception and lead to amblyopia. Properly aligned eyes do not mean healthy eyes. So, the forth item may be teaming problems of the eyes. Signs of uncoordinated eyes (also named binocular vision problems) include headaches and eyestrain. An eye doctor should also pay attention to eye focusing problems during an eye exam. These problems may bother both children (resulted from incomplete focusing skills development) and aged people due natural decline, such as presbyopia.

Another part of examination items is related to more severe eye diseases. Early detection and subsequent treatment of eye diseases are essential to minimize the risk of lifelong vision impairment. Diabetic eye diseases are common and probably cause small blood vessel leaks or bleeding eye and macula swelling. Other eye diseases or health problems include glaucoma, high blood pressure, high cholesterol and so on. During eye exams, your doctor may check signs of these diseases using instruments or just by staring at your eye’s blood vessels and retina.

Vision screenings can never get the same effects from complete eye exams. A vision screening may test blur, muscle coordination and common eye diseases. These brief tests can only perform as an indicator for further eye exam, rather than replacing it. A driver’s license renewal just requires such a vision screening. Vision screenings can be conducted simply by school nurses, pediatricians, health care providers and volunteers. In contrast, a complete eye exam including all vision aspects testing must be carried out by an eye doctor, rather than incompetent family physicians and pediatricians. Only professional doctors can ensure all testing items and work out a proper personal treatment plan on the basis of the exam results.

If your doctor can not determine you eye problems, you may need to take a second exam after a period of time. For assured problems, a subsequent treatment plan will be made. Your eye doctor will prescribe different solutions for different eye problems. Corrective eyewear is commonly used for refractive errors. Binocular vision problems always require a vision therapy or strabismus surgery. For vision health maintenance or dry eyes relief, eye vitamins or vision nurture may be the right choice.