As society becomes more and more modern, people’s lives become more and more fast-paced, work pressure increases, electronic devices become more and more popular, and environmental pollution becomes more and more serious, which also leads to more and more health risks. Dry eye is one of the diseases that have become more and more prevalent in recent years. The onset of dry eye is caused by multiple factors, including environmental factors, the patient’s lifestyle, and their own inflammation. First of all, there are environmental factors. With the development of industry and the inaction of environmental protection departments, our living environment is becoming worse. The massive emissions of car exhaust and factory gases, the ravages of dust storms, the destruction of the ozone layer, all these lead us to be in the “toxic fog”, our skin and eyes are constantly receiving damage from toxic gases, tear secretion is affected, which leads to the occurrence of dry eyes. The pace of modern life is accelerating, many people often work overtime, rest time is not guaranteed, and the need to use computers, cell phones and other electronic devices for a long time, the usual transient reduction, tear film can not be formed in time to protect the cornea, which is another major cause of dry eye. Many people are prone to chronic conjunctivitis because they do not pay attention to eye hygiene or use eye medications containing preservatives for a long time, plus a series of eye inflammations such as keratitis, sclerenitis and blepharitis, which can also lead to tear abnormalities and thus dry eyes. The most important symptoms of dry eye are dry eyes, shimmering, congestion, and even tearing, and in severe cases, blurred vision. If these symptoms occur, you should seek medical attention, you can use preservative-free artificial tears to relieve the symptoms, but the most important thing is to find the cause of the disease, to do the right treatment.