Before cataract surgery, patients need to use antibiotic drops in the eye to clean the conjunctival sac in advance, and also need to have a detailed examination of the fundus and intraocular pressure to rule out any conditions that make them unsuitable for immediate surgery, in addition to measuring the degree of the IOL implanted inside the eye. Cataract surgery is a common ophthalmologic procedure that improves vision by removing the cloudy lens and implanting a clear IOL. Prior to the surgical procedure, patients are required to clean the conjunctival sac by applying antibiotic drops to the eye, such as levofloxacin drops, to minimize the risk of post-operative infection. Patients also need to have a detailed examination of the intraocular pressure and fundus to ensure that there is no retinal detachment, glaucoma or other conditions that may affect the safety of the surgery. In addition, patients also need to have IOL measurements done before surgery, so that the exact degree of IOL that needs to be implanted inside the eye during surgery can be calculated, and the vision can be better corrected after surgery. It is recommended that post-cataract surgery patients follow the doctor’s instructions, have regular checkups, and seek prompt medical attention when discomfort occurs.