Surgical technique
PVD
INTRAOPERATIVE COMPLICATIONS, POSTERIOR VITREOUS DETACHMENT, OPTIC NERVE, RETINA, PVD, CORTEX
A 25-gauge PPV was performed in all cases. In the Kaminari Kagura group, after a core vitrectomy, the posterior hyaloid was engaged with a vitrectome probe at the site of the optic nerve head. The vitrectome was moved by following one of the vascular arcades in a zig-zag fashion (lightning bolt shape) (Figs. Design of the movement of the vitrectome probe during the induction of the posterior vitreous detachment. The shape of the movement is like to design a lightning bolt on the surface of the retina (Kaminari in Japanese)Engaging the posterior hyaloid on the optic nerve head. The white reflex is the sign of the engaged vitreous cortex (white arrow) (In the control group, after a core vitrectomy, the posterior hyaloid was gently engaged with the vitrectomy probe at the papillo-macular site and detached in a tangential fashion. The procedure was repeated until the PVD induction. The time to complete the PVD was measured by analysing the intraoperative video recorded by four independent and masked expert operators (G.G., M.M.C., A.S., and G.G.). The times required were recorded for each eye, and the mean value was calculated. The agreement between the time graders was estimated with a Bland–Altman plot. The intraoperative complications were recorded.