当出血情况严重且使视力严重下降，特别是当其持续时间超过3个月时则须要行玻离体切割术。

Vitrectomy may be indicated for severe hemorrhage and substantially diminished visual acuity, especially if it persists longer than 3 months.

youdao

当出血情况严重且使视力严重下降，特别是当其持续时间超过3个月时则须要行玻离体切割术。

Vitrectomy may be indicated for severe hemorrhage and substantially diminished visual acuity, especially if it persists longer than 3 months.

youdao