Inclusion Criteria:  idiopathic MHs, the MH is closed ,and follow-up for at least 1 month after vitrectomy.  Exclusion Criteria:  High myopia (≥6 diopters,AL≥26.5mm), increased intraocular pressure (IOP, >21 mm Hg) or glaucoma, severe cataract, severe corneal disease，severe systemic conditions that prevent surgery, and history of ocular trauma, intraocular inflammation, retinal vascular disease, or previous ocular surgery