I recently admitted a patient with alkali burns, which was caused by cement splashed into the eyes at a construction site. When he came to our hospital, a large amount of cement remained in the conjunctival sac, and I would like to talk about some knowledge after alkaline burns to draw attention to it. Both acid and alkali burns can cause damage to the eye and serious blindness, but alkaline burns are generally more serious compared to acid. It takes a long time to repair, does not heal for a long time, the condition is repeated, and the healing is poor. The most common chemical injuries seen on construction sites are generally lime, cement, white ash and cement, etc. The penetrating power of cement is slightly weaker and the healing phase is better. Post-injury emergency treatment is particularly important: 1, flushing, with a large amount of water to the injured part of the continuous flushing, emergency situations do not have to overemphasize the water quality, in the injured site can be carried out, when available in the case of table numbing agent, a more detailed examination. 2, removal of solid material, especially hidden in the conjunctival sac. 3, anterior chamber puncture, as alkaline substances quickly enter the anterior chamber, if the contact time is long and the concentration of injury-causing substances is large, give anterior chamber puncture, or bulbar conjunctival radial incision and flushing, as appropriate. 4.Remove the local inactivated tissue, depending on the situation, do not remove too much. 5.Local use of broad-spectrum antimicrobials, mainly to prevent infection, and for epithelial defects, a large amount of antibiotic ophthalmic ointment applied to the conjunctival sac and pressure bandaging can promote epithelialization of the ocular surface and reduce adhesions at the same time. 6. Local hormone-containing eye solutions and eye ointments can be used for treatment when the epithelium is intact. 7, ciliary muscle paralyzing agents such as atropine eye ointment to prevent adhesions, etc. Timely treatment at the site is very important, and you should go to the hospital as soon as possible while dealing with it. Get professional treatment to avoid delaying the best treatment and causing eye damage or leading to blindness.