Lacrimal pessary implantation is a procedure in which a pessary is inserted into the lacrimal duct to block the lacrimal duct to minimize the loss of the patient’s own natural tear production and to keep it on the surface of the eye for a longer period of time. It is a new method for the treatment of moderate to severe dry eyes that require long-term artificial tear drops and a high number of drops per day, as well as ocular surface diseases such as trachoma, filiform keratitis, neurotrophic keratopathy, diabetic corneal epitheliopathy and corneal epitheliopathy after penetrating corneal transplantation. It is often necessary to implant a degradable tear duct bolus at the beginning of tear duct implantation treatment, which naturally degrades within 3 months, to predict the therapeutic effect of non-degradable tear duct bolus and to observe whether patients have adverse reactions. Traumatic lacrimal duct dissection. The broken end of the lacrimal duct is routinely found and sutured together under a surgical microscope, and a “U” shaped silicone tube is implanted to support the anastomosis, which is removed after 3 months. However, the “U” shaped silicone tube exposed at the inner corner of the eye can cause cosmetic defects and foreign body sensation, and tearing is inevitable during the three months the silicone tube is blocked in the tear duct. The tear ducts will be unsupported by the anastomosis of the broken end of the tear ducts and will be prone to adhesions and obstruction for life. If a biodegradable lacrimal plug is implanted into the traumatic lacrimal duct anastomosis, it can play a supportive role and prevent adhesions, but it can also slowly degrade over time, eliminating the irritation of the lacrimal silicone cannula to the eye and not affecting the appearance, which is really a multi-benefit. The surgical result is very good.