Myopia Can Be Relieved if One Often Go Outdoors
If the lights reflected by the objects can not be focused onto the retina, people may suffer from myopia. And sufferers of this problem can not see clearly of distance objects, but nearby objects.
Biologically, myopia can be inherited. That’s to say children who have nearsighted parents may also have this problem. But facts have also proved that living environment can also play crucial role in the development of myopia. Usually, people who overuse their eyes tend to have this problem. Therefore, myopia may appear on children and adults.
According to some data, this problem has struck more and more people, particularly during the past half century. And it is predicated that over two in five people in the world may get this problem in the next ten years. And now a third US people have myopia.
One of the reasons why larger population gets myopia is firmly related to children and their living environment. Children have to read and see nearby objects all day. And they can not see clearly of distance objects as a result. In addition, children in big city may run much higher risk of getting this problem, as they may play games and watch TV for very long time.
Still, some other studies have also confirmed such relation. Children with myopia spend less time outdoors than those with normal vision. The former group also spends more time in watching and using computers.
To some extent, exposure to sunlight within reasonable range can help avoid myopia.
Generally, sufferers of myopia can not see distant objects, can not read blackboard, seldom go outdoors, etc. What’s worse is myopia may lead to other serious eye problems, like glaucoma, retinal detachment, etc.
Therefore, sufferers should receive regular eye test. By and large, glasses and lenses are some of the most common devices to treat myopia. They can help the light focus accurately on the retina. Of course, surgery is also good alternatives for adults.
Orthokeratology is also one of the most popular methods to treat it, though some rather complicated procedures are involved.
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Truth about Myopia – The Right Posture
Myopia, also near-sightedness called, is one of the most common eye problems for people, especially among the children and adolescence.
The myopia is mostly caused by the macular imbalance, which means the myopic eyeball will be elongated because of the pressure by two oblique muscles which bind the eyeball in the middle. Normally, the focus will be right on the retina when the parallel rays come into your eyes, yet the elongated eyeball, caused by the tightness of muscles, brings the focus in front of the retina. So the myopia’s may find it difficult to see far objects clearly.
Myopia mainly happens to the young people between the ages of eight to fifteen, but you should not think that age over fifteen does not have the possibility to come into the myopia problem. As we know, a child’s physical and nervous system undergo such a great change during the puberty that they may feel anxious or afraid, also they may face a series of competition and confinement at school. All the changes and competitions result in great strains on the young children and the strain is a potential factor for the myopia and other visual defects.
Trying to see the words on the blackboard clearly, fearing to be asked by teacher in class and being afraid to fail in the examination will give a rise to the physical and mental tensions. Actually, as these thoughts are very common among the children, so they have to undergo all the things at school. Also, when the children try to read books, they develop a stooping posture as they crouch lower and lower to their books. Then the headaches, nervous habits and squinting come along with the wrong posture. As times goes by, the children become unconfident and begin to stay alone instead of joining in competitive games. Though their parents persuade them to get together with other children, they feel reluctant.
Parents would take the children to the ophthalmologist to get a pair of glasses to correct the vision problem caused by myopia. When the eyes are fitted with eyeglasses, the focus can be formed right on the retina. However, it does not give a good look on the children and they must not like the feeling behind lenses. The eyeglasses actually cut the children off the games which are necessary for human body. It is a vicious circle. As the shape of eyeball remains unchanged and the fundamental cause is not remedied, your vision cannot be improved but become weaker and weaker until the muscles gradually lose its flexibility.
According to all the information given above, we can find that the original cause of myopia may be the posture. Stooping over when walking and bending forward when reading should be completely avoided as the cramped neck muscles will cut off the circulation of blood to the brain and eyes. Besides, a person with stooping posture may indicate his inferiority and failure.
Stand erect and look straight will give you a new focus on your life. You can see much farther than before because you have the smooth circulation of blood to your eyes and you look more confident. Moreover, you can do some eye exercise to help you to deal with the myopia problem.
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Introduction of Myopia
Myopia, commonly known as nearsightedness, is the most common eye problem in this industrial world, which is a big concern for people worldwide. The research shows one out of four Americans has myopia. The symptom is people can see clearly at a certain distance, but when the object is a little far away, the vision will become blurred. That is because the light from distant object can not focus on retina, but in front of the retina. One fact is though myopia is a worldwide eye disorder, we have to admit that people still don’t have much understanding of myopia, and till now no satisfying treatment has been developed.
Researches indicate that the modest overgrowth of the back part of the eye is the cause for myopia. And myopia can be transferred from one generation to the next, which means, if the father or mother has myopia, then their children are most likely to be nearsighted. One point we should know is myopia is opting to be worse in teenage, but it will become stable in adulthood.
Myopia can be classified into four degrees according to its severity, which is measured in diopter power. The more degrees myopia to be, the more serious the nearsightedness is. The four degrees are mild, moderate, common and extreme. For people with mild myopia, myopia usually does not influence their daily tasks, but when they see objects a little far away, the vision will become blurred. And for extreme myopia, which is in 6 or more diopters, people can see objects clearly only when they are very close to the eyes.
For the treatment of myopia, the most commonly used method is to wear glasses or contact lenses as most people do. The eyeglasses and contact lenses can help the light from distant objects to focus on retina. And the other way is to make Lasik surgery. Myopia is a growing eye disorder in the modern world. For one thing, it brings people with some troubles and inconveniences in their blurred vision; for another thing, it also drives the industries of glasses, contact lenses and eye surgeries.
Above all, we can see myopia is a common eye disorder in the modern world, but it is complex and difficult to solve. Besides, it also has some economic and social impact. So everyone should get to know some basic knowledge of myopia and try our best to take good care of our eyes.
Reference
Myopia treatments
Also named nearsightedness, myopia is so common today that it is estimated to affect one-third of the population in the world. In contrast to hyperopia which deprive people from close vision, people with myopia can see up-close objects but can not manage distance things such as highway signs.
Similar with hyperopia, myopia also involves irregular eyeball shape. People with myopia have longer eyeballs than normal people, so that light rays are focused in front of the retina. Normal vision requires a light focus right on the retina.
Without proper correction, myopic people always squint to see distance objects and may suffer from headache and eye strain. Those wearing glasses or contact lenses with improper prescription are also bothered by these symptoms. As people age, myopia will stop progressing and become stable, although sometimes it performs myopic creep.
Whether you need full-time eyeglasses or contact lenses wearing depends on your degree of myopia. People with myopia have prescriptions with negative numbers, and a higher number represents a heavier myopia.
Refractive surgeries are becoming popular since they can reshape the cornea of myopic patients and eliminate the need for glasses. PRK and LASIK are two of the available refractive surgeries, both of which use an excimer laser. While a PRK just removes a layer of corneal tissue and flattens the cornea, a LASIK involves a flap cut through the top of the cornea.
For night wear, special contact lenses applying orthokeratology (ortho-k) can reshape the cornea over time and provide clear vision during daytime without lenses or glasses. As implantable lenses, phakic IOLs can deal with special situations that are beyond LASIK and PRK. These IOLs are permanently placed in the eye during the surgery, eliminating any maintenance.
There is also pathologic myopia, which is extremely severe and can not be corrected by any of the above treatments. This type of myopia occurs in children with extremely elongated eyeball by age 12. The situation will worsen as children age and unfortunately develop abnormal growth of new blood vessels. There was no effective treatment during a long period until the approval of drug Visudyne along with non-thermal laser application in 2001. This treatment named photodynamic therapy has been proved to be effective.