Five cases of neonatal opsoclonus were studied. It appears that opsoclonus first seen shortly after birth may be associated with other neurologic signs, especially mental retardation and ophthalmoplegia. Opsoclonus may also be seen without other neurologic signs in cases with extensive fundus abnormalities and poor visual acuity.
Bienfang DC. Opsoclonus in Infancy. Arch Ophthalmol. 1974;91(3):203-205. doi:10.1001/archopht.1974.03900060211011