customized the outer shell of phacoemulsification handpieces for an ophthalmic surgical instrument enterprise. Using special stainless steel materials, through mirror polishing and vacuum ion coating technology, it achieved both wear resistance, scratch resistance and biocompatibility. Meanwhile, the internal cavity structure was optimized, reducing the ultrasonic energy loss of the surgical instrument by 18%, shortening the average cataract surgery time by 12 minutes, and helping the partner increase the market share of ophthalmic instruments to 17%