Abstract

Objective To investigate the pathogenesis of IMH,according to the image of OCT.Pa- tients and.Methods 59 cases (65 eyes) of IMH were examined by OCT.Stage Ⅰ :6 cases (6 eyes).Stage Ⅱ : 22 cases (24 eyes),early stage Ⅱ : 10 cases (10 eyes),late stage Ⅱ : 12 cases (14 eyes).Stage Ⅲ: 21 cases (25 eyes).Stage Ⅳ : 10 cases (10 eyes).Results In stage Ⅰ ,4/6 was found the traction of biconvex posted-or vitreous detachment at fovea.In early stage Ⅱ,9/10 was found the traction of biconvex posterior vitreous de-tachment at fovea.In late stage Ⅱ,10/14 was found the operculum,and among the opercula,8/10 was found some evulsed retinal tissue.In stage Ⅲ and IV,16/25 and 7/10 were found that the thickness and glisten of in-ternal limiting membrane (ILM) were increased,and epretina membrane could be found in some cases.Con-elusion In stage Ⅰ and Ⅱ ,the pathogenesis of IMH is the fore-and-all traction of vitreous at the fovea.In stage Ⅲ and Ⅳ ,the pathogenesis of IMH is the contraction of ILM. Key words: Idiopathic Macular Hole; Pathogenesis

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