In the modern busy working life, the window of your soul may have such and such discomfort, many people because it does not yet affect the work, life and do not take it seriously, a little heavier self buy some medicine coated, temporary relief, to hear from the doctor such a new term “dry eye”, you can not help but worry. In the medical “dry eye” is also known as dry conjunctiva, keratitis, is due to the cornea before the tear film quality or quantity of the conjunctiva, corneal epithelium can not maintain the normal function of a disease, the tear film is made up of a very thin surface lipid layer of 10.5 μm and rich in polysaccharide proteins and mucoproteins of the aqueous layer, the lipid layer has a slow evaporation of the tear film. The lipid layer has the effect of slowing down the evaporation of the tear film. Under the condition of 30% relative humidity, the evaporation rate of the tear film is 3 μm/h, and the evaporation decreases when the humidity is high, while the evaporation increases when it is dry. Dry eye is a chronic disease. Its causes are as follows: 1, due to advanced age, lack of sleep, mental stress and other physiological reasons, causing a decline in the quality of tears. 2, taking part of the antihypertensive drugs and some of the mental tranquillizers have an impact on the tear production, such as taking paracetamol on the tear production of harmful effects, taking cardiac glycosides and some of the current contraceptives can reduce the tear production. 3, due to the environment, such as in the room dry, caused by the evaporation of tears. 4, long time engaged in computer operation, car driving, reading and other fine work, the number of transient eye decreased. 5, due to contact lenses, allergic conjunctivitis, atmospheric pollution, ultraviolet rays and other reasons, and caused by the reduction of tears, the quality of decline. If your eyes feel abnormal in daily life, please check whether you have “dry eye”. By abnormal sensation, we mean that patients with dry eye are sensitive to airflow, and windy environments are particularly easy to dry the cornea, so you should be more comfortable indoors than outdoors, and the frequency of transient eyesight decreases when patients are concentrating and the cornea is exposed to air for more than a few minutes. When the patient is concentrating, the frequency of eye transients decreases and the cornea is exposed to air for longer than the tear film breaks up, so the dryness is particularly noticeable. The dryness of the eye is severe when waking up at night or in the early morning because tear production decreases during sleep, and smoke is almost intolerable to tear-deficient patients because the smoke itself is powder particles suspended in the air that form a direct impact on the surface of the cornea and cause discomfort. It is also important to understand that dryness and tear deprivation are not specific symptoms. On the contrary, some dry eye patients complain of tearing or tear overflow, which may sound paradoxical, but in fact dry eye may stimulate a reflex increase in tear secretion, in the same way that a foreign body or an abrasion on the surface of the eye may do so. In the face of dry eye produced vision loss and other serious damage to the eye tissue and may even cause blindness complications, we first need to do in our daily lives to strengthen the prevention, improve the awareness of modern self-care of the eyes: 1, daily life attention to eye care, can reduce the symptoms of dry eye, such as usually pay attention to the mental relaxation, feel the eye fatigue to take a proper rest; do not try to look up, will be the television or computer placed below eye level position. Try not to look upward, place the TV or computer in a position below the eye level, and watch TV or use the computer time should not be too long, desk, computer monitor placed in a place not directly irradiated by sunlight, because of the reflection of lighting light on the screen will cause eye fatigue, while maintaining a certain degree of humidity in the room. 2, found that eye discomfort, to go to the ophthalmology department in a timely manner. Found that the symptoms are serious or continue to be unable to slow down, should receive timely diagnosis and treatment of ophthalmologists. If the diagnosis is dry eye disease, you can apply artificial tears eye drops and other medications; 3. If the visual fatigue is caused by eyeglasses or contact lenses, you can reconfigure suitable eyeglasses according to the eyeglasses prescription from the ophthalmologist and pay attention to the eye care in daily life. Please people have a real understanding and awareness of dry eye, in order to open your eyes to feel the freshness of the day, always care about the windows of the self-soul.