With the advancement of information technology, operating cell phones and computers is almost an inevitable part of modern life. There are many people who work as programmers. Desk clerks, bank operators. Information center workers. Paperwork clerks, etc., must face cell phones and computers all day long, looking at the computer screen, long-term work, it is easy to get eye fatigue. In the ophthalmology clinic, we often hear patients complaining of eye fatigue or headaches, and most of them are cell phone and computer workers. Eye fatigue is a subjective feeling and cannot be considered a disease strictly speaking, so it is difficult to diagnose it based on the subjective complaints of the patient, and therefore it is difficult to use objective instruments to detect the real problem. Most patients complain of dryness, burning, or a foreign body sensation in the eyes, unstable or temporarily blurred vision, and may feel heavy eyelids, swelling and pain in the eyes, or even headaches. Nevertheless, a detailed eye examination can reveal some clues, such as conjunctival congestion, loss of vision, loss of regulation, reduced tear production, etc. In severe cases, there may even be an increase in intraocular pressure. According to clinical surveys, the incidence of eye fatigue among cell phone and computer users is about 70 percent, which is higher than the 30 percent of non-mobile phone and computer users. The degree of eye fatigue is closely related to the length of time spent at work, and has nothing to do with the nature or content of the work, that is, whether you are a clerk, proofreader, cashier or counter attendant, as long as the work reaches a certain time, it will produce eye fatigue symptoms. There are many factors that cause eye fatigue, generally speaking, can be broadly summarized as the following reasons: 1, glasses refraction: glasses refraction is not appropriate, the degree is too deep, or a high degree of astigmatism people. If the prescription of the glasses is not correct, or because of the distortion of the frame, resulting in incorrect pupil distance, may therefore increase the burden on the eyes and eye fatigue symptoms. 2, work posture and distance: work too close or incorrect posture, too close to the computer screen, more vulnerable to radiation damage, especially when using a laptop computer, computer operation should maintain a distance of more than 60 centimeters, about 30 degrees down the line of sight. Because the screen is too small, resulting in the user must work at close range, head forward, neck muscle force, it is easy to form work strain, aggravating eye fatigue. 3, the screen quality and clarity: some cell phone computer users because of the use of time too long, resulting in lower screen quality, clarity degradation, thus causing difficulties in reading. 4, the work environment: the environment is too strong or too weak light, resulting in a strong reaction between the screen and the outside world, easy to cause eye irritation. After understanding the symptoms and causes of eye fatigue, the next method to improve the introduction. As mentioned earlier, the degree of eye fatigue is related to the length of time of cell phone and computer users, so the best way to avoid eye fatigue is to rest between, do not operate continuously. If you are a glasses person, then it is important to have a pair of suitable glasses. For people over forty, it is best to use bifocal lenses or to wear glasses with a lighter prescription when typing. Working posture and distance is also very important, try to maintain a distance of more than 60 centimeters, adjust a most appropriate posture, so that the line of sight can be protected down about thirty degrees, such an angle can make the neck muscles relax, and make the eye surface exposed to the air to minimize the area. Whether the screen’s luminosity and clarity are appropriate, whether the environment’s light is soft, and whether the height and comfort of the table and chair can match the distance of the phone and computer are all elements that must be considered. If the symptoms of eye fatigue are very serious, there is no way to improve, you must consult an ophthalmologist, with the use of artificial tears or ciliary muscle relaxants to improve the symptoms of eye fatigue. If you work as a mobile computer user and you suspect eye strain, try to answer the following six questions. If more than half of the answers are yes, then your eye strain may have affected your daily life and it is time to consult an ophthalmologist. 1.Feeling dry eyes and lack of tears. 2.Feeling that your eyelids are heavy and drooping and cannot be opened. 3.Feeling a burning sensation in your eyes. 4.Sight is unstable, sometimes clear and sometimes blurry. 5.Feeling the presence of foreign bodies in the eyes. 6.Feeling swelling and pain in the eyes, headache.