The field of vitreoretinal surgery has developed rapidly since the application of vitrectomy via the flat part of the ciliary body in the early 1970s. Vitreous surgery has gradually evolved toward minimally invasive surgery. Minimally invasive vitrectomy is a vitrectomy that is performed through the application of delicate and complex surgical instruments that allow the surgical incision to be significantly reduced to a suture-free size, i.e., a so-called “microtrauma”. Instead of making a large incision in the eye, a special trocar needle is used to puncture the bulbar conjunctiva and sclera directly into the vitreous cavity. Because the diameter of both the trocar needle and the surgical instruments are small, only three very small eyelets are required to pass through the wall of the eye, so the incision can close on its own after trocar removal without the need for sutures and with minimal trauma. 23G transconjunctival sutureless system has been recognized and used in recent years. Compared with the traditional transciliary flat vitrectomy (20G), it has the advantages of shorter operative time and faster postoperative recovery. The current standard vitrectomy instrument tube diameter is 0.89 mm (20G) The size of the puncture port is 0.72 mm, the tip length is 9.6 mm, the puncture knife is hard and sharp, and the beveled tip design can reduce the puncture resistance. The trocar is 4 mm long, with an inner diameter of 0.65 mm and an outer diameter of 0.75 mm. The trocar is made of titanium, which reduces the friction between the instrument and the catheter and increases the precision of the operation, and the trocar can be locked on the puncture knife so that it does not slip off easily during puncture. The design of the positioning clamping slot makes it easy to insert and dial the instruments during surgery and to remove the trocar after surgery; the trocar is placed parallel to the scleral margin at an angle of 20°-30° to the sclera (compared with vertical scleral puncture, the incision closes faster) and passes through the conjunctival sclera and ciliary body; when the interface between the trocar and the puncturing knife is reached, the puncturing knife changes direction and spins back to the posterior pole; the puncturing knife is slowly withdrawn. UBM showed good closure of the incision on the first day after surgery, and the inner incision flap could be aligned without ciliary body choroidal separation and without vitreous impaction Surgical video: 2000r/min, 300mmHg, Demonstration: 1) cutting peripheral retina, reducing mechanical pull on the retina during cutting, safer operation close to the retina, 2) retinal anterior membrane peeling, 3) inner boundary membrane peeling, intraocular laser treatment.