“Knife” traditional ultrasonic cataract surgery procedure Surgical steps: clear corneal incision → continuous circular tearing of the anterior capsule → pulverization of the nucleus The key step of traditional cataract ultrasound emulsification is currently performed manually and relies heavily on the operator’s experience and skill. The quality of the anterior capsule tear affects complications and refractive prognosis and is the most difficult step. The manual ultrasonic nucleus fragmentation and aspiration method reduces the energy requirement but is very technically challenging. The corneal incision is a major factor in the speed of recovery and prognosis of vision, and is prone to mechanical distortion and leakage.
“Femtosecond laser cataract surgery procedure: annular anterior capsulorhexis incision → laser nucleus fragmentation → corneal incision The femtosecond laser is the shortest proven class of laser with the shortest pulses, releasing ultra-short pulses of energy in as little as one trillionth of a second, making it ideal for ophthalmic procedures requiring high precision. Previously, this technology was used mainly for laser correction of myopia. The application of the femtosecond laser to cataract surgery is a topic of great interest to physicians. Femtosecond laser-assisted cataract sonoemulsification surgery uses a femtosecond laser instead of the surgeon making a manual incision and pre-segmenting the clouded lens within the capsule, the entire process is assisted by computerized scanning imaging technology, and the surgeon then removes the lens with ultrasound. The laser procedure is precise, safe and significantly improves the post-operative vision restoration results for cataract patients.