Congenital Nystagmus (example 1)
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"The congenital nystagmus in this young
man has a jerk wave form with fast components beating to the right in
center gaze. The amplitude increases in right gaze. Patients with
congenital nystagmus do not complain of oscillopsia, but may notice
blurring of vision in directions of gaze in which the nystagmus is
greater in amplitude. A null zone is present in left gaze. Patients
will often assume a face turn to place the eyes in the null zone to
improve vision. Nystagmus remains horizontal in upgaze unlike
acquired forms of nystagmus."
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