Traumatic cataract 12 years should be treated according to the symptoms, the impact on vision is not big can be followed up and observed, obviously affect the vision of the patient should be as early as possible to perform cataract extraction, and as far as possible after the operation implantation of artificial lens. 1. Follow-up observation: If the lens is limited to clouding and has little effect on vision, it can be followed up for observation. 2. Cataract extraction: When the lens is obviously cloudy and affects vision, cataract extraction should be performed. When the lens ruptures and the cortex protrudes into the anterior chamber, glucocorticoids, non-steroidal anti-inflammatory drugs and intraocular pressure-lowering medications can be used, and the cataract can be surgically removed after the inflammatory reaction in the anterior segment subsides. If the inflammatory reaction does not subside after treatment, or the elevation of intraocular pressure cannot be controlled, or the lens cortex is in contact with the corneal endothelium, the cataract should be removed promptly. 3. Lens implantation: After cataract extraction, an artificial lens should be implanted at the same time as possible. After implantation of IOL, vision can be restored quickly and it is easy to establish binocular monovision and stereoscopic vision. Traumatic cataract 12 years should go to the hospital in time, with the help of the doctor early treatment, to avoid visual impairment.