Myopia has commonly known as being nearsightedness and shortsightedness. Myopia presents with blurry distance vision, but generally gives good near vision. In high myopia, even near vision is affected as objects must be extremely close to the eyes to see clearly, and patients cannot read without their glasses prescribed for distance. Myopia usually caused by bad reading habits. For instance, you read too much or read under dim light, your eyes are easy to be hurt because you need to concentrate to books and keep much focus in eyes than daytime. If you staring computer screen in a long time, UV lights can hurt the back of your eyes, then the normal lights are not easy to be received. That is, computer screen will produce UV lights, you need to prevent them just like miners must wear special eyeglasses to prevent UV lights. So you should arrange proper time to play computer.
