Ekstensywna mielinizacja okołotarczowa włókien nerwowych

A rare ophthalmic disorder characterized by visual abnormalities (such as myopia, strabismus, or amblyopia) due to the presence of myelinated retinal nerve fibers, which appear as whitish patches with feathery edges at the level of the retinal nerve fiber layer and may be continuous or discontinuous with the optic nerve head. The defect can be unilateral or bilateral.