Post-cataract laser, i.e., posterior cataract laser treatment after cataract surgery, is generally safe, but there are certain risks, such as IOL damage, secondary glaucoma, and macular edema. After cataract surgery, if posterior cataract, that is, clouding of the posterior capsule membrane, occurs, YAG laser posterior capsulotomy treatment is needed, which is relatively safe and can be done in outpatient clinic, but there are some risks. The main points are as follows: 1. IOL damage: Because the IOL and the posterior capsule membrane are very close to each other, there is a possibility of damage to the IOL during laser treatment. 2. Secondary glaucoma: the debris of posterior capsule membrane into the anterior chamber can cause turbidity of aqueous humor, which may cause elevation of intraocular pressure after blocking the angle of the atrium, leading to secondary glaucoma. 3. Macular edema: Inflammatory reaction after laser may cause macular edema, resulting in vision loss and distortion of vision. Patients are advised to visit authoritative medical institutions to minimize the risks associated with the surgery, and should give timely feedback to their doctors once related symptoms appear.