Patients can determine whether they have an impingement by the presence or absence of a foreign body sensation in the eye, whether they have repeated eye infections, and whether their eyelashes are in contact with the cornea. 1. Foreign body sensation in the eyes: after the eyelashes come into contact with the cornea, it will cause the patient’s eyes to feel foreign body sensation and other uncomfortable symptoms, which can determine whether there is an impingement. 2. Repeated eye inflammation: impingement can cause patients to have repeated conjunctivitis and keratitis, which can also indicate whether the patient has impingement. 3. Whether the eyelashes are in contact with the cornea: impingement refers to the growth of eyelashes in the direction of the eyeball, which are in contact with the cornea and repeatedly stimulate and rub the cornea. In our life, we can use the mirror to check whether our eyelashes are in contact with the cornea and whether they are growing inward to determine whether there is impingement. It is recommended that patients with implantation should consult a doctor in time to assess their condition and follow the doctor’s instructions to avoid damage to their eyesight.