You may be unfortunately one suffering from myopia, however, do you know how myopia occurs. Generally speaking, there are two main reasons for the formation of myopia. The first one is the hereditary factor. Researches reveal that if parents are both nearsighted, their children have a 33% chance to develop into myopia, which normally tends to show up when children get their 8 to 12. The second one should be the environmental factor. If you spend most of your time on close work, such as watching TV, and working before a computer, etc., you will probably develop into nearsightedness. Close work will also aggravate condition if you’ve already have a myopia. However, what makes things strange is that some people will not get shortsighted even if they often do close works. This is what researchers are exploring.
In theory, myopia occurs when eyes are larger than normal eyes in size. Thus, bigger and elongated, eyes project the light rays from faraway objects to a mid point of the eye but not onto the retina. Such images often come to be blurry. This is the so called refractive error in the eye. The roles eyeglasses and contact lenses perform in nearsightedness is to help make image project to the place, that is the retina, where they suppose to be, in which way image come back to be clear.
Apart from blurry vision, nearsighted person would often suffer from other symptoms, such as burning or tired eyes, headaches and restricted tolerance to reading. Similarly, when someone sits closely to the television to enjoy programs, he is not surely myopic but maybe his or her specific interest or habit. Moreover, a middle aged person who suddenly finds things become fuzzy in vision is also not sure to be myopic. He is more probably recognized as an early symptom of cataracts which is a common eye problem for the middle aged. What is more, it also can be an indication of keratoconus, which would make the cornea of the eye change shape and may be a inducement of diabetes. Therefore the best way to know whether you are nearsighted or not is to have an eye check in doctor’s office.
Myopia is not a must procedure one will suffer from in his or her life. If you are not a nearsighted person, spend more of your time out in the fresh air. A study shows that those who do so often are less likely to get myopic than those who spend most of their time on close work; if you are a nearsighted person, there are also effective treatments. Besides wearing eyeglasses and contact lenses, eye surgical corrections are another options which are more preferable, among which LASIK is doable. Lasik, or say PRK (Photo Refractive Keratectomy) is a kind of eye surgery which is accomplished by removing a small piece of tissue prior to the flap being reattached. In this way the eyes can focus objects on the retina again. However, in view that each surgery is a big step for everyone, therefore to consult related information in details and take side effect into consideration is necessary.
Anyhow, no matter whether you are shortsighted or not, and if you are, no matter what kind of treatment you are going to take, it is important to have frequent eyes examinations. It is suggested to test eyes for any changes on an annual basis as for children and to test every two or three years as for adults.