“…Moreover, comprehensive spectral-domain optical coherence tomography analyses of different retinal spaces, including sub-ILM spaces, forming in pit of the disk pathology, has been conducted by Imamura et al 1 Recurrent traction of ILM, tractive membranes, or vitreous remnants may form such ILM domes or ridges spanning a hole for oil dislocation. 5 In this case, there were arguments for the following possible mechanism of sub-ILM oil dislocation: Imamura et al 1 have recently reported dislocation of fluid from the optic pit itself into various retinal layers; Doyle et al 6 have described membranes spanning the optic disk pits and colobomas, which seemed to be protective against macular edema in cases of optic pit. Arguably, such membranes could have been removed during surgical treatment of proliferative vitreoretinopathy membranes.…”