Phacoemulsification for cataract surgery

Phacoemulsification is usually performed on patients with a low hardness of the lens nucleus, e.g., below grade 4, and a healthy corneal endothelium, e.g., a corneal endothelium count of more than 1200 per square millimeter. Phacoemulsification has the advantages of small incision and rapid recovery. However, if the hardness of the lens nucleus is high, e.g., it has reached grade 5, excessive ultrasonic energy will be used during the operation, resulting in greater damage to the eyeball. In addition, if the corneal endothelial function is poor, after cataract phacoemulsification surgery, it may show corneal endothelial function decompensation, thus forming persistent corneal edema, causing blurred vision and foreign body sensation and pain in the eyes.