Improving visual acuity in congenital nystagmus
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SCIENTIFIC REPORT The effects of gabapentin and memantine in acquired and congenital nystagmus: a retrospective study
Background: Pharmacological treatment has been successful in some forms of acquired neurological nystagmus. However, drugs are not known to be effective in idiopathic infantile nystagmus or nystagmus associated with ocular diseases. Methods: The authors retrospectively analysed Snellen visual acuity (VA), subjective visual function, and eye movement recordings of 23 patients with nystagmus (13 ...
متن کاملInterrelations between measures of visual acuity and parameters of eye movement in congenital nystagmus.
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 ...
متن کاملFoveation period and waveforms of congenital ocular nystagmus.
Normal visual acuity requires a stationary retinal image on the fovea. If fixation instabilities cause movement of the retinal image across the fovea for a few degrees, visual acuity is diminished. Nystagmus as the fixation instability, consequently, may impair vision. Period of foveation is the area in the wave form, i.e. a brief period of time when the eye is still and is pointed at the objec...
متن کاملCONGENITAL AND lATENT/MANIFEST lATENT NYSTAGMUS: DIAGNOSIS, TREATMENT, FOVEATION, OSCILLOPSIA, AND ACUITY
Congenital (CN) and latent/manifest latent nystagmus (LMLN) are the two most common types of benign infantile nystagmus. They can be distinguished definiti�ely by eye-movement recordings; their clinical characteristics are too similar to allow reliable differential diagnosis. Most treatments for CN, surgical or optical, depend on exploitation of either a gaze-angle or convergence null. Other tr...
متن کاملThe effects of afferent stimulation on congenital nystagmus foveation periods
Visual acuity in congenital nystagmus (CN) patients is related primarily to the duration of "foveation periods", during which the image of the target is relatively stationary in the foveal area. Thirteen individuals with CN were studied to test the hypothesis that somatosensory stimulation (vibration or electrical) of either the forehead or the neck damps CN and improves visual acuity. We ident...
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