Tearlessness occurs when the lacrimal glands are not developed congenitally, or due to an acquired autoimmune system disorder that disrupts lacrimal secretion, resulting in the desire to cry without tears. Tearlessness is an eye disease that cannot be cured, and patients can only rely on medicated ointments to improve symptoms or use special moisturizing glasses to avoid water evaporation. Its examination methods are as follows. 1, eye physical examination: through medical means and methods of the subject’s eyes for a comprehensive examination, including visual acuity, eye position, fundus, conjunctiva, intraocular pressure and so on. It can effectively prevent and control eye diseases and protect eye health. 2.Visual examination: observe whether there are any abnormal changes in the lacrimal gland and tear duct area. Such as whether there is swelling of the lacrimal gland, whether the tear dots are orthotropic and open, whether there is redness and swelling of the skin in the tear sac area, and whether there is overflow of tears. 3.Palpation: When examining the tear sac, squeeze the anterior ridge of the tear with the index finger to observe whether there is tenderness and fluctuation, and whether there is pus flowing backwards from the tear point or into the nasal cavity.