Blurred vision after cataract surgery may be caused by posterior cataract, corneal clouding and postoperative inflammation. 1. Posterior cataract: After extracapsular cataract extraction, the residual cortical or lens epithelial cells proliferate and form a cloudy posterior cataract, which will lead to clear and blurred vision after cataract surgery. 2. Corneal clouding: it may be due to the cornea suffered from external factors during surgery, the nutritional supply is limited to a certain extent, metabolism is slow, resistance to lesions and repair is also affected, which will lead to blurred vision. 3. Postoperative inflammation: Inflammation will exist for a period of time after cataract surgery. Under the inflammatory stimulation, the eye tissues will be edematous and deformed, resulting in blurred vision. If the symptom of blurred vision after cataract surgery persists, you need to seek medical treatment in time.