What does latent nystagmus mean?
Latent nystagmus is defined clinically as nystagmus which appears on covering one eye and beats towards the uncovered eye. Recordings showed that the latent nystagmus in 28 patients had slow phases with linear or exponentially decreasing velocity.
What disease causes nystagmus?
What causes nystagmus? Jerk nystagmus usually results from diseases affecting the inner ear balance mechanisms or the back part of the brain (brainstem or cerebellum). Pendular nystagmus can result from brain diseases such as multiple sclerosis, but can be a congenital problem as well.
Why do patients with cerebellar disease exhibit nystagmus?
It is seen in patients with cerebellar disease (particularly the flocculus), muscle palsy and drug toxicity. A failure of the step (or tonic) eye position command from the gaze-holding network (the neural integrator) is deemed to be the reason for the presence of the nystagmus2,6,12.
What does a person with nystagmus see?
What does a person with nystagmus actually see? Children with nystagmus typically see the world similarly to other children, but with some blurriness. To the surprise of many parents and caretakers, in congenital nystagmus the world does not actually appear to be “shaking” to the child.
What neurological conditions cause nystagmus?
Causes of nystagmus can include:
- Head trauma.
- Central nervous system diseases, such as multiple sclerosis and brain tumors.
- Certain medications, such as anti-epilepsy drugs.
- Various eye disorders, such as cataracts, strabismus, nearsightedness, farsightedness, and astigmatism.
What is Latent Nystagmus with one eye?
In Latent Nystagmus, when either eye is covered, both eyes show slow phase drift toward the covered eye. With both eyes viewing, there is no nystagmus, or very small amplitude nystagmus. If vision in one eye is suppressed, the nystagmus may appear with binocular viewing, referred to as Manifest Latent Nystagmus.
What is nystagmus?
Nystagmus Types – StatPearls – NCBI Bookshelf Nystagmus is derived from Greek nustagmos (nodding, drowsiness) and nystazein (be sleepy or doze). It is a rhythmic, involuntary, rapid, oscillatory movement of the eyes.
Is latent nystagmus a vestibular disease?
Conclusions Latent nystagmus is the ocular counterpart of peripheral vestibularnystagmus. Its clinical expression in humans proclaims the evolutionary functionof the eyes as sensory balance organs. Vestibular disease holds little interest for the ophthalmologist.
What are the causes of pendular nystagmus?
The most common cause of acquired pendular nystagmus is multiple sclerosis. If the vision is asymmetric between the two eyes, the poorer-seeing eye has greater amplitude and frequency of nystagmus compared to the fellow eye.