AIM: To observe the effect of 23G micro invasive vitrectomy in treating Terson syndrome.

METHODS: Six cases(11 eyes)of Terson syndrome with severe vitreous hemorrhage were performed 23G micro invasive vitrectomy since conservative treatment did not show effect on them. Membrane peeling and silicone oil tamponade were applied according to the retinal conditions. We observed the postoperative visual acuity(VA), retina and complications.

RESULTS: All the cases had obvious improvement of postoperative VA,in which 8 eyes in 11(73%)was better than 0.5. The postoperative VA of one eye(9%)were less than 0.1 because of pre-existing proliferative vitreoretinal diseases and retinal detachment.

CONCLUSION: 23G micro invasive vitrectomy is an effective approach in treating Terson syndrome. Most of the cases indicate good visual outcome. However, the cases with severe proliferation have poor outcome. We recommend performing an early 23G micro invasive vitrectomy for the failure of conservative treatment in Terson syndrome.