Internal Limiting Membrane Peeling-reposition to Treat Idiopathic Macular Holes

Inclusion Criteria: * The patients are diagnosed as macular hole by optical coherence tomography. * Age ranges from 50 to 80 years. * The patients have indication for surgery. Exclusion Criteria: * Traumatic macular hole. * Combined with serious epiretinal membrane. * Combined with diabetic retinopathy, hypertensive retinopathy. * Combined with other ocular diseases, such as keratitis，uveitis，retinal vasculitis. * \- 6.0 diopters or more of spherical equivalent, 26mm or more of axial length. * History of intraocular surgery. * Presence of staphyloma. * Other ocular diseases that could influence macular microstructure or visual function Exit criteria: * For reposition group, the patients will exit the research if the peeled ILM cannot reposition successfully. * Due to adverse events, especially severe adverse events, the researchers consider withdrawal of patients based on concerns of safety and ethics; * Drop out; * The patients voluntarily withdraw the informed consent; * Serious violation of the study protocol due to the subjects or investigators' reasons; * Other reasons that the researchers believe for quitting the study.