The difference among intravitreal injection, intravitreal+intravenous injection, intravitreal injection with GCV and dexamethasone, and intravenous injection is not significant.

• 玻璃体腔注射联合静脉注射、GCV联合氟美松玻璃体腔注射与单纯GCV玻璃体腔注射比较，视网膜坏死分级无明显差异。