A study of nystagmus associated with optic nerve hypoplasia

Abstract

In this paper, the authors report a patient who presented with bilateral optic nerve hypoplasia associated with nystagmus. Electronystagmography (ENG) conducted in three sessions showed features consistent with the ‘pseudocycloid’ form of congenital nystagmus.

The authors' study suggests that the nystagmus in optic nerve hypoplasia is essentially similar to idiopathic motor-defect nystagmus and the nystagmus seen in ocular albinism and bilateral opacities of the ocular media. Their data support the previous hypothesis that there is a common brainstem motor abnormality in sensory-defect and motor-defect nystagmus.

Key Words:

• optic nerve hypoplasia
• congenital nystagmus
• electronystagmography