Lens detachment can be caused by trauma, intraocular pathology, inflammation, etc. Lens detachment in the elderly usually does not recover on its own and needs to be restored through treatment. Trauma can cause rupture of the intraocular suspensory ligament, intraocular lesions such as staphyloma, dilated eyeballs and other mechanical elongation of the suspensory ligament, and ciliary body inflammation can also dislocate or subluxate the lens. Lens dislocation is usually not self-recoverable. For patients with more obvious dislocation and severe visual impact, surgical treatment is needed, considering direct lens removal and implantation of a new IOL. For patients with total dislocation of the lens, depending on which part of the lens is dislocated to, such as dislocation to the anterior chamber, which may cause closed-angle glaucoma, surgery is needed as soon as possible, and the surgical method is also to remove the lens and implant an IOL. If the dislocation is in the vitreous, it will not cause significant complications, and the surgery can be postponed until the systemic condition is stabilized, and need to be combined with vitrectomy surgery. It is recommended that elderly people with lens dislocation should go to the hospital for treatment promptly.