The gauze is removed the day after normal cataract surgery. Cataract is a change in optical quality caused by a decrease in the transparency of the lens due to external or self-inflicted factors. The main manifestations are decreased visual acuity, decreased contrast sensitivity, refractive changes, monocular diplopia or hyperopia, glare, and color vision changes. Cataract is mainly treated by surgery. Surgery is generally considered to be indicated when visual function no longer meets the patient’s needs and cataract surgery offers the possibility of improving vision. Commonly used surgical procedures, such as ultrasonic emulsification cataract aspiration, involve the application of ultrasound energy to emulsify the cloudy lens nucleus and cortex and then aspirate it, preserving the posterior lens capsule. The surgical incision is small, with little tissue damage, no need for suturing of the incision, and a short surgical time. The surgery can be done under surface anesthesia, with or without the implantation of a suitable IOL depending on the condition of the eye during the surgery. After the surgery is completed, ophthalmic ointment is applied inside the conjunctival sac, gauze is wrapped around the eye, and the gauze is removed on the second day of the surgery when the eye is re-examined, and visual acuity, intraocular pressure, slit lamp and other tests are performed again.