1. Normal life and living should be maintained to avoid complications due to agitation. For example, for patients with diabetes, urine sugar should be kept negative, for patients with hypertension, blood pressure should be stabilized at normal level, and for patients with chronic bronchitis, there should be no coughing and wheezing symptoms. This will ensure the safety of the surgery and prevent postoperative complications. 2. Preoperative training, repeatedly train the patient to gaze at the microscope light (available at home with a low light flashlight) to maintain good fixation. Because intraoperative eyelid spasm and eye rotation are not conducive to smooth surgery, patients should be encouraged to establish self-confidence and obtain good cooperation. 3. Use antimicrobial eye drops for 3 days before surgery to control local infected lesions in the eye. Patients with lacrimal tract infection should be treated and bacterial culture of the conjunctival sac should be performed, suggesting sterile growth before surgery. 4. Keep the bowels open, take laxatives or soap enemas if necessary to prevent postoperative ocular congestion and bleeding due to stool knots. Some elderly patients suffer from constipation, which can easily cause serious postoperative complications such as blood accumulation in the anterior chamber and wound collapse after surgery, thus affecting the surgical effect, so appropriate laxative can be used to laxative before surgery. 5. Patients taking oral anticoagulation or platelet aggregation inhibiting drugs (such as Favarin, aspirin, etc.) should inform our doctors during the preoperative examination and choose to temporarily stop using the drugs according to the specific situation.