https://www.aao.org/1-minute-video/trocar-assisted-tap-inject
In this video, Drs. John Chancellor and Ahmed Sallam demonstrate a method for performing a modified intravitreal tap and inject. This method uses a 25-gauge valved trocar, a pair of forceps and a 25-gauge three-quarter inch needle attached to a 5 mL syringe. The eye is marked 3.5 or 4.0 millimeters from the limbus and stabilized with the forceps while the trocar is inserted parallel to the limbus and directed towards the center of the vitreous cavity. The surgeons use the port to perform both the vitreous tap using a 25-gauge needle and 5 mL syringe, and to administer intravitreal antibiotics using a standard 30-gauge 1.5 inch needle. The trocar is then removed with the forceps and the beveled incision massaged closed with a cotton bud. This method improves patient comfort and eliminates the need for multiple injections into the eye.