Fig. 1

Procedure of FCVB implantation. (1) After conventional vitrectomy, make a peripheral incision under the iris and expand to the supratemporal sclera puncture; (2) Choose the right model and check the tightness of FCVB (see A, B); (3) The FCVB is folded three times and placed in the injector to be implanted in the eye (see C, D); (4) The product implantation point is located 5.0 mm behind the scleral limbus of the temporal cornea. A 15° knife is used to cut the sclera vertically. The length of the incision depends on the product model, 3.5–4.5 mm, in an "L" shape(see E); (5) Put the product placed in the implanter into the eyeball (see F); (6) Inject appropriate silicone oil into FCVB through the drainage valve (see G); (7) Inject a proper amount of viscoelastic to restore the anterior chamber (see H); (8) The FCVB drainage tube was ligated, fixed on the surface of the iris, and the fascia and bulbar conjunctiva were sutured. (see J, k); (9) Suture the incision (see L)