| INO | internuclear ophthalmoplegia; inosine |
|---|---|
| OHAHA | ophthalmoplegia-hypotonia-ataxia-hypacusis-athetosis [syndrome] |
| PEO | progressive external ophthalmoplegia |
| POLIP | polyneuropathy-ophthalmoplegia-leukoencephalopathy-intestinal pseudoobstruction [syndrome] |
| VSO | vertical supranuclear ophthalmoplegia |