*The studies are categorized based on the section of the eye involved in a study†In these studies, the patients did not have any ophthalmologic findings or symptoms; however, due to the presence of ocular manifestations in some patients with PRES and leukoencephalopathy, the studies were includedINO, internuclear ophthalmoplegia; GD1b-IgG antibody, antibody against ganglioside complex GD1b; MOG, Myelin Oligodendrocyte Glycoprotein; PRES, posterior reversible leukoencephalopathy; MFS, Miller Fisher syndrome; N/A, not available. The gene discussed is OMG; the disease is internuclear ophthalmoplegia.