Dry eye is an extremely common eye disease that has received a lot of attention in recent years. It is not a new eye disease, but is just getting more and more attention as awareness grows. This is because as society progresses, the average life expectancy is increasing and the elderly population is increasing greatly; young people are spending more time looking at computers and playing with cell phones, which are greatly increasing the population of dry eye. The latest definition of dry eye is a type of disease in which tear film instability and/or damage to the ocular surface caused by abnormalities in the quantity or quality of tears or fluid dynamics, resulting in eye not symptoms and dysfunction. The previously mentioned dry eye, dry eye disease and dry eye syndrome are now uniformly referred to as dry eye. The medical definition of dry eye is rather abstract, but to put it simply, dry eye means that the amount of tears is not enough to moisten the eyes, or the nutrients in the tears are reduced, or the surface of the eyes are not smooth enough. The amount of tears is not enough to moisten the eyes, so the eyes will be dry, foreign body sensation, stinging, etc.; the nutrients in the tears are not enough to moisten the eyes, so the eyes will still have a foreign body sensation, stinging, etc.; since the surface of the eyes is not smooth enough, the foreign body sensation, stinging, etc. is easy to understand, and this is mainly seen in patients with pterygium, lid lacrimation, conjunctival laxity, etc. This is mainly seen in patients with pterygium, lid lacrimation, and conjunctival laxity. The tear film is necessary to protect the eye and is necessary for the eye to see clearly. When there are not enough tears, not enough nutrients in the tears, or when the eye surface is not smooth, the tear film is not as stable and blurred vision can easily occur. After blinking, the tear film temporarily recovers and you can see clearly, but because the tear film is unstable, it soon breaks, so it is blurred again at once. Or some people can get temporary relief after taking eye drops, and it is not long before it is bad again. Because the eyes of dry eye patients cannot be well protected by tears, they often have slight damage, which is manifested as photophobia, eye redness, etc. The glasses are very sensitive, and wind-blown stimulation will be uncomfortable and tearful, and what is usually called wind-blown tearing is therefore. For the treatment of dry eyes, patients with mild cases can choose artificial tear drops to enhance the moisturization of the eyes, in addition to not continuing to use the eyes for a long time and pay attention to intermittent rest. There is no such eye drops as artificial tears on the market, which is a general term for a class of eye drops that can replace tears to moisten the eyes, such as sodium vitrate drops, chondroitin sulfate drops, polyethylene glycol drops, carbomer drops and so on. Because eye drops are not designed to be used up on the same day after opening, many eye drops have preservatives added to them, some of which can have a certain effect on the eye surface. If the conditions allow, you can use a daily eye drops, one per day, this eye drops is not added preservatives, for the protection of the eyes more advantageous. For moderate or moderate and dry eye patients with ocular surface disease still have to see an ophthalmologist for consultation and treatment, because it involves the use of hormones, and these pros and cons need the help of a specialist to weigh, and some even need surgery.