Eye wash usually refers to the use of water, eye wash, etc. to clean the eye, the clinician often use drugs to clean the patient’s eye surface skin, conjunctival sac, tear ducts before internal eye surgery, in order to remove the skin surface grease and dirt, sterilization and smooth the role of the tear ducts, and the daily use of eye wash liquid is mainly water or eye wash, etc., the following common benefits and disadvantages: a. Benefits 1, treatment: If you have conjunctivitis, keratitis and other eye infections, or other causes of abnormal secretions in the eye can be removed by eye wash. If there is conjunctivitis, keratitis and other eye infections such as diseases, or other causes of abnormal eye secretions, you can wash your eyes to remove secretions to help the disease recovery; there are chemical substances, such as acid, alkaline solutions, etc. splashed into the eyes or eyes with foreign bodies that can not be discharged by tears, you can also immediately wash the eyes with a large amount of water to reduce the damage caused by these substances to the eyes; 2, care of the eyes. The common formal eye wash on the market has a certain moisturizing and cleansing effect on the eyes, washing the eyes can to some extent relieve eye fatigue, dryness, long-term eye users, work or living environment prone to eye dirt foreign bodies, and poor eye habits leading to eye discomfort can be properly washed eyes under the guidance of a doctor. Second, the disadvantages 1, infection: water also contains a large number of bacteria, non-essential use of water to wash the eyes is not recommended, so as not to exceed the cleaning capacity of tears and eye infection; if the wrong cleaning of the eyes, not only can not play a role in sterilization, there may be damage to the eyes or induce infection, increasing the rate of eye disease; 2, affect the normal function of the eyes: eye wash may contain a variety of additives The use of eye wash often may have an adverse effect on the tear secretion function and self-cleaning function of the eyes, and long-term use may aggravate the dryness of the eyes; 3, allergies: some people may also have allergic reactions to the components of eye wash, eye redness, pain, itching, tearing and other symptoms, you need to go to the ophthalmology clinic as soon as possible for treatment. Tears secreted by the human body have a very good cleaning effect on the eyes, effective and without side effects. In the case of normal tear secretion and no eye disease, you usually do not need to wash your eyes by yourself. You can consult your doctor to see if you meet the necessary conditions for washing your eyes, and do not blindly use eye wash or medication to rinse your eyes.