The advantage of posterior cataracts treated with laser is that it can enhance the patient’s vision, while the disadvantage is the possibility of transient elevation of intraocular pressure as well as vitreous clouding. After extracapsular cataract extraction (including ultrasonoemulsification extraction) or after lens trauma, the residual cortical or lens epithelial cells proliferate and form a clouding called a posterior cataract, which may lead to a decrease in the patient’s vision. Currently, it is mainly treated by laser, which is used to cut the cloudy posterior capsule to enhance vision. Laser treatment is less invasive, quicker to recover, and more effective. Laser treatment also brings corresponding risks, such as patients may have a transient increase in intraocular pressure after laser posterior capsulotomy treatment. In addition, the debris formed after cutting the posterior capsule membrane may float in the vitreous cavity, causing vitreous clouding, resulting in black dots fluttering in the field of vision when the patient looks at something. It is recommended that patients go to the ophthalmology department of a regular hospital for detailed consultation and treatment as prescribed by the doctor.