J Neuroophthalmol 2020 Oct 27. Epub 2020 Oct 27.
Department of Ophthalmology and Vision Sciences (JAM, EAM), University of Toronto, Toronto, Canada; Division of Neurology, Department of Medicine (JAM, EAM), University of Toronto, Toronto, Canada; and Kensington Vision and Research Centre (JAM), Toronto, Canada.
Background: To determine whether significant compression of the optic nerve by the internal carotid artery (ICA) can produce an optic neuropathy with optic disc cupping that resembles glaucoma in patients without elevated intraocular pressure (IOP).
Methods: This was a retrospective case series of patients referred to neuro-ophthalmology for a possible nonglaucomatous optic neuropathy. Patients were included in the study if they had preserved visual acuity, optic disc-related visual field defects, optic nerve cupping, IOP less than 21 mm Hg, open angles, and unequivocal radiological compression of the ipsilateral optic nerve by an intracranial blood vessel. Read More