The human eye has a self-purifying ability, and it is not recommended to clean your own eyes when the self-purifying function has not been damaged, but when the eye is uncomfortable due to pathological factors, you need to wash your eyes in a sitting or lying position under the guidance of a professional doctor. 1, when foreign objects enter the eye, such as particles of sand and dust, small flying insects, etc., you can generally take eye drops under the guidance of a doctor to stimulate the eye to flow with tears and foreign objects out of the eye; 2, for keratitis, the process is more complicated. For keratitis, the eye washing process is more complicated, and the eye washing can only begin after controlling the inflammatory infection and without secretions, requiring the doctor to first rinse the eyelids and periocular skin with a rinse solution, then gently wash with a sterile cotton swab, and finally instruct the patient to rotate the upper and lower eyes to clean the internal structures of the eyes in turn; 3. appropriate flushing; 4. According to the nature of acid and alkaline substances equipped with the appropriate saline or water to dilute the erosion of acid and alkaline substances to the eye, usually by immersing the eye into the solution or water for flushing; Note: For those with penetrating injuries and corneal ulcers, eye flushing should not be performed. For patients who cannot tolerate it, eye irrigation can be performed by a medical professional under local anesthesia.