A condition characterized by weakness or impairment of eye muscles arising from the disruption in the transmission of brain messages to the eyes. It can be congenital or develop later in life and can involve one or more of the six extraocular muscles. The disorder is of two types; internal ophthalmoplegia, which occurs due to damage to the nerve fibers that coordinate lateral eye movement and Chronic progressive external ophthalmoplegia, which manifests in people between 18 and 40 years old.