Table 2.

Differential diagnoses of Chronic Progressive External Ophthalmoplegia.

•Myasthenia gravis

• Medications: antiretrovirals; statins

• Sagging eye syndrome

• Wernicke encephalopathy

• Thyroid eye disease

• Progressive supranuclear palsy

• Miller Fisher syndrome

• Congenital cranial dysinnervation disorders: congenital fibrosis of the extraocular muscles (CFEOM); Moebius syndrome; Duane syndrome etc