Three members of the same family with hereditary congenital nystagmus (eN) were studied. Nystagmus amplitude, fre­ quency, and Intensity functions deter­ mined the gaze angle with least nys­ tagmus. Visual acuity was increased in all cases by the use of version or composite prisms. In both pendular and jerk forms of eN, the fovea oscillated on alternate sides of the fixation spot and exhibited ...

The authors assessed relationships between visual acuity and the amplitude, frequency, intensity, and duration of foveation periods in a retrospective study of 32 patients. Twenty-four patients had congenital idiopathic nystagmus, and eight patients had nystagmus and albinism. Visual acuity was determined for Landolt ring optotypes and, as the extrapolated high-frequency cutoff of the contrast ...

AIMS/BACKGROUND To examine the effects of acupuncture at the sternocleidomastoid muscles on foveation characteristics in congenital nystagmus. METHODS Six patients with congenital nystagmus (CN) received a series of treatments consisting of two needles inserted into each sternocleidomastoid, stimulated by tapping gently every 5 minutes, for 20 minutes per session. Their eye movements were rec...

It has been suggested that contact lens wear improves the visual function of patients with visual loss from congenital nystagmus. In this study, four patients with congenital nystagmus had two evaluations separated by at least one week (one with spectacles, one with contact lenses) including visual acuity, contrast sensitivity, oscillopsia scale, quality of life questionnaire (NEI VFQ-25), and ...

Duke-Elder (1949) states that congenital nystagmus varies considerably in extent, direction, and rapidity of the movements. In most cases it affects both eyes equally, but in a few instances it is uniocular. Typically the movements are pendular in type, horizontal in direction, and do not alter on lateral deviation, although they may then become jerky in type. Sometimes the movement is coarser ...

Objectives At the conclusion of this program, participants will be able to: 1. Name the principal neurotransmitters thought to be important for eye movement control. 2. Cite side effects of medications commonly used to treat nystagmus, including gabapentin, baclofen and clonazepam, and types of nystagmus they have been shown to benefit. 3. Identify three nystagmus-causing conditions for which d...