In a case of rhegmatogenous retinal detachment in a highly myopic eye, repeated optical coherence tomography revealed a small break around the scar tissue of a myopic choroidal neovascularization that was difficult to observe with conventional slit-lamp examination using a contact lens due to severe chorioretinal atrophy. This article presents the optical coherence tomography findings of the retinal detachment before and after the treatment and discusses the pathologic role of myopic choroidal neovascularization in the retinal detachment.