Ocular neuromyotonia. A clinical description of six patients

Evidence of orbital deformation in indirect optic nerve injury. Weight lifter's optic neuropathy

A 16-year-old boy developed monocular visual loss due to optic neuropathy following frontal head trauma. His trauma was unique in that it consisted of a static loading force to the brow, rather than the dynamic impact more commonly associated with blunt orbital injuries. This case demonstrates the role of isolated deformation of orbital bones in the pathogenesis of indirect optic nerve injury.

Ocular neuromyotonia after radiation therapy

Ocular neuromyotonia is a paroxysmal monocular deviation that results from spasm of eye muscles secondary to spontaneous discharges from third, fourth, or sixth nerve axons. We observed this rare disorder in four patients who had been treated with radiation for tumors in the region of the sella turcica and cavernous sinus. Based on these cases and four others identified in the literature it would appear that radiation predisposes to a cranial neuropathy in which ocular neuromyotonia may be the major manifestation. Radiation appears to be the most common cause of ocular neuromyotonia.