In a study conducted 15 years ago, the 'Vitrectomy for Prevention of Macular hole Study Group' was not able to prove the benefits and advantages of vitrectomy for impending macular hole; however, during the interim period, notable improvements have been achieved with regard to diagnosis and efficacy of treatment.~Therefore, we designed this study to identify the effect of current vitreous surgery for symptomatic impending macular hole.~Characteristics of this study is as below~Multicenter, prospective clinical trial. (early surgical intervention vs.surgical intervention when full-thickness macular hole occurs)~Non-randomized study (decision was made by patients after full explanation)~After 1 year follow up, functional change(visual acuity)and anatomical change(development of full-thickness macular hole) would be evaluated
This study is designed to verify hypothesis that early vitrectomy may prevent impending macular hole from progression to full-thickness macular hole.