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Topic: Nystagmus


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In the News (Fri 19 Jul 19)

  
  Nystagmus: Overlooked Causes and Treatments
Nystagmus is characterized by an involuntary movement of the eyes, often noted as a shaky or wiggly movement.
One of the symptoms of fibromyalgia is nystagmus.
Nystagmus is a common symptom of multiple sclerosis.
www.ctds.info /nystagmus.html   (1797 words)

  
 American Nystagmus Network
Nystagmus is an involuntary eye movement which usually results in some degree of visual loss.
This website has been created by the American Nystagmus Network, Inc., a nonprofit organization established in February, 1999 to serve the needs and interests of those affected by Nystagmus.
ANN, Inc. Caveat: Though discussions on specific problems are permissible and expected, remember that no posting here shall constitute professional health care or medical advice, and you should never rely on any contribution to this, or any, Internet discussion forum on important medical or professional health care questions.
rd.business.com /index.asp?epm=s.1&bdcq=Nystagmus&bdcr=1&bdcu=http://www.nystagmus.org/&bdct=20071119141753&bdcp=&partner=2662601&bdcs=nwuuid-2662601-2B585736-A9DC-A9D3-D48B-82A84BD335F9-ym   (193 words)

  
 Nystagmus.co.uk - Real Life Experiences
Nystagmus affects me all the time, but I am fortunate because my nystagmus is not as severe as some.
Whether you are a child or adult that has nystagmus, a parent, teacher, or friend of someone who suffers from nystagmus, you will be able to increase your knowledge and hopefully understanding of the problems that sufferers face.
I feel that children with nystagmus may find this interesting and they may be able to get in contact with others who suffer from nystagmus.
www.nystagmus.co.uk   (780 words)

  
 NYSTAGMUS
If the nystagmus does not follow these characteristics, it is likely not peripheral vestibular (for example it may be due to congenital nystagmus), or there may also be other problems superimposed with the oculomotor system or central pathways.
Seesaw nystagmus is a rare binocular disorder characterized by alternating vertical skew deviation and conjugate ocular torsion.
Caloric nystagmus is a vestibular nystagmus induced by a temperature differential across a semicircular canal, that is not perpendicular to the gravitational axis.
www.dizziness-and-balance.com /practice/nystagmus.html   (2239 words)

  
 Nystagmus.co.uk - Facts and Scientific Information
Nystagmus is an involuntary movement of the eyes which is usually from side to side, however sometimes the eyes move up and down and in some cases the eyes may move in a circular motion.
Nystagmus in early childhood may possibly be caused by a defect in the eye or visual pathway from the eye to the brain (the optic nerve).
Acquired nystagmus which occurs later on in life may be a symptom of another condition such as a stroke, multiple sclerosis or even a blow on the head.
www.nystagmus.co.uk /nystagmus/facts   (353 words)

  
 Understanding nystagmus
Nystagmus in early childhood may be caused by a problem with the eye or visual pathway from the eye to the brain.
Because nystagmus may be the first sign of serious disorder of the eye or the brain, it is vital that when nystagmus first develops the child or adult is referred to an ophthalmologist (eye specialist) or a neurologist.
Nystagmus may cause vision to vary during the day and is likely to be affected by emotional and physical factors such as stress, tiredness, nervousness or unfamiliar surroundings.
www.rnib.org.uk /xpedio/groups/public/documents/PublicWebsite/public_rnib003659.hcsp   (1961 words)

  
 Nystagmus Information on Healthline
Nystagmus is a condition in which there is involuntary and rhythmic movement or oscillation of the eye.
Nystagmus can be sensory and develop as a result of poor vision, or it can be motor and develop as a result of a neurological problem.
One variant of congenital nystagmus is spasmus nutans, which appears as a triad with accompanying head nodding and torticollis (head turn or tilt), and is seen between four months and three-and-a-half years of age and usually resolves without treatment within one to two years of onset.
www.healthline.com /galecontent/nystagmus   (765 words)

  
 HGN
Nystagmus is an involuntary jerking or bouncing of the eyeball that occurs when there is a disturbance of the vestibular (inner ear) system or the oculomotor control of the eye.
"Nystagmus" is a term used to describe a "bouncing" eye motion that is displayed in two ways: (1) pendular nystagmus, where the eye oscillates equally in two directions, and (2) jerk nystagmus, where the eye moves slowly away from a fixation point and then is rapidly corrected through a "saccadic" or fast movement.
In either case, because the nystagmus is caused by the eye trying to catch up with the moving object, it lasts only as long as it takes for the object to stop moving, for the object to pass out of the field of vision, or for the eye to catch up to the object.
www.nhtsa.dot.gov /people/injury/enforce/nystagmus/hgntxt.html   (11944 words)

  
 Aniridia Network International - About aniridia - Nystagmus   (Site not responding. Last check: )
Nystagmus is the involuntary, rhythmical, oscillations of one or both eyes, in any or all fields of gaze.
Head-tilting may decrease the nystagmus and is usually involuntary (toward the fast component in jerky nystagmus, or in such a position to minimize pendular nystagmus).
Educationally, children with nystagmus (who may tend to lose their place in beginning reading instruction) may be helped through the use of a typoscope (card with a rectangular hole, to view one word or line at a time) or an underliner (card or strip of paper to "underline" the line being read).
www.aniridia.org /conditions/nystagmus.html   (330 words)

  
 NYSTAGMUS
Nystagmus may also be abnormal, usually in situations where one would want the eyes to be still, but they are in motion.
Ashoff et al concluded that this type of nystagmus was caused by damage to the cerebellar nuclei, and Gresty et al suggested that the lesion was near the oculomotor nuclei.
Upbeat nystagmus and the ventral tegmental pathway of the upward vestibulo-ocular reflex.
www.tchain.com /otoneurology/practice/nystagmus.html   (3073 words)

  
 nystagmus - multiple sclerosis encyclopaedia   (Site not responding. Last check: )
Nystagmus is rapid, involuntary movements of the eyes which is often unnoticeable to people with the complaint.
In MS, nystagmus is often associated with internuclear ophthalmoplegia - which is a loss of coordination between the two eyes caused by a lesion in an area of the brain called the medial longitudinal fasciculus (MLF).
Nystagmus can also be caused by lesions in the cerebellum, the area of the brainstem where the vestibular cranial nerve arises or further along the vestibular pathways.
www.mult-sclerosis.org /nystagmus.html   (198 words)

  
 Understanding Nystagmus by Drs. Richard & Laura Windsor - Vision World Wide, Inc.
The term nystagmus is derived from the Greek word, "nmstagmos", which was used to describe the wobbly head movements of a sleepy or inebriated individual.
Early onset nystagmus often accompanies vision loss acquired at birth or soon after and may be one of the first signs that a child has a loss of vision.
Nystagmus can be acquired later in life due to neurological dysfunction such as a head injury, multiple sclerosis or brain tumors.
www.visionww.org /drswindsor-nystagmus.htm   (1571 words)

  
 Nystagmus
Nystagmus is involuntary, repetitive movements of the eyes.
Nystagmus is not usually inherited, and sometimes the cause isn't known.
Nystagmus can be the result of other eye disorders such as congenital blindness, Leber's congenital amaurosis or other hereditary retinal diseases, retinopathy of prematurity, retinoblastoma, retinal and optic nerve colobomas, tumors and developmental defects of the optic nerve, congenital cloudiness of the cornea, or achromatopsia.
www.regionaleye.com /anatomy_diseases/diseases_of_the_eye/eye_diseases/nystagmus.shtml   (539 words)

  
 nystagmus   (Site not responding. Last check: )
Nystagmus (nye-STAG-muss) refers to rapid rhythmic back-and-forth involuntary eye movements, usually side to side, rarely in the vertical plane.
Visible, abnormal nystagmus may be caused by abnormality of any one of the three basic mechanisms that regulate position and movement of the eyes: fixation (focusing on and tracking objects), conjugate gaze (keeping the eyes parallel so that the images coincide), or vestibular mechanisms (the balance organs).
The blind have a particular type of nystagmus, described as "roving." It is disconcerting for some to see, and is one of the reasons the blind may wear dark glasses.
www.drhull.com /EncyMaster/N/nystagmus.html   (293 words)

  
 eMedicine - Nystagmus, Acquired : Article by Christopher M Bardorf, MD, MS
This type of nystagmus can be accentuated by otolithic stimulation by placing the patient on their side with the intact side down (eg, if the lesion is on the left, the nystagmus is accentuated when the patient is placed on his right side).
This striking and unusual form of nystagmus may be seen in patients with chiasmal lesions, suggesting loss of the crossed visual inputs from the decussating fibers of the optic nerve at the level of the chiasm as the cause or lesions in the rostral midbrain.
A small amplitude rapid jerk nystagmus in primary position with the fast phase directed away from the side of the lesion in combination with a slow, gaze-evoked nystagmus directed toward the side of the lesion suggests a mass compressing the brain stem with peripheral vestibular nerve involvement.
www.emedicine.com /oph/topic339.htm   (4193 words)

  
 MedlinePlus Medical Encyclopedia: Eye movements - uncontrollable
Nystagmus refers to rapid involuntary movements of the eyes that may be from side to side (horizontal nystagmus), up and down (vertical nystagmus) or rotary.
Nystagmus may be either congenital (present at birth) or may be acquired (caused by disease or injury later in life).
Nystagmus may be observed through the following procedure: If the affected person spins around for about 30 seconds, stops, and tries to stare at an object, the eyes will first move slowly in one direction, then move rapidly in the opposite direction.
www.nlm.nih.gov /medlineplus/ency/article/003037.htm   (688 words)

  
 Eye.com.ph | Acquired and Congenital Nystagmus in Infancy
Sensory nystagmus is due to the lack of the fixation reflex secondary to neonatal blindness.
Nystagmus acquired in infancy, may be a sign of a serious neurological condition, and therefore warrants a neurology consult.
In contrast to congenital, acquired nystagmus is often associated with the perception of the environment moving, or oscillopsia.
www.eye.com.ph /nystagmus.htm   (818 words)

  
 nystagmus
Although vertical nystagmus is defined according to the direction of the fast phase, the amplitude of the slow phase and rapid corrective phases can vary according to the direction of gaze.
When the ballerina reaches a certain point in her rotational spin (when the eyes are displaced to the near-extreme limits of its excursion in the socket), she re-fixates her eyes on another visual target, and the voluntary saccade causes a rapid eye movement to the intended re-fixation position.
Vertical nystagmus doesn't occur in peripheral vestibular disease because the pathology would have to differentially affect the posterior canals of both sides, summating the resulting loss of upward slow drifts and cancelling the opposing slow torsional drifts - which is very unlikely.
www.jeffmann.net /NeuroGuidemaps/nystagmus.html   (5006 words)

  
 eMedicine - Nystagmus, Congenital : Article by Theodore Curtis, MD
Nystagmus present at birth or prior to age 2 months is more likely to be idiopathic in nature or due to neurologic dysfunction.
Nystagmus that presents after age 6 months is considered late infantile or childhood nystagmus and carries a graver prognosis.
Latent and manifest latent nystagmus always are jerk-type with the fast phase in the direction of the fixing eye and decreasing velocity of the slow phase; the nystagmus is larger in the amblyopic or nonfixing eye, and amplitude decreases in adduction.
www.emedicine.com /oph/topic688.htm   (3082 words)

  
 Nystagmus
Vertical nystagmus occurs much less frequently than horizontal nystagmus and is often, but not necessarily, a sign of serious brain damage.
Nystagmus is the lingering adjustment of the eyes to tracking the world as it revolves around them.
In pendular nystagmus the speed of motion of the eyes is the same in both directions.
www.lifesteps.com /gm/Atoz/ency/nystagmus.jsp   (940 words)

  
 Nystagmus Network   (Site not responding. Last check: )
Nystagmus is an eye condition characterised by rapid, jerky eye movements.
It is a symptom which should always be investigated by a specialist as it can be a result of other disorders.
Nystagmus Network is a UK-based self-help group providing support for adults and children with nystagmus, their parents and teachers and fostering research into the condition.
www.btinternet.com /~lynest/nystag01.htm   (57 words)

  
 Nystagmus - Symptoms, Treatment and Prevention
Nystagmus is an unintentional jittery movement of the eyes.
Nystagmus usually involves both eyes and is often exaggerated by looking in a particular direction.
Some forms of nystagmus are associated with reduced vision, such as occurs in extreme near or farsighted people or in those with scars in the retina or optic nerve.
www.healthscout.com /ency/1/516/main.html   (335 words)

  
 Eye Conditions > Nystagmus -- EyeMDLink.com
Nystagmus is the condition characterized by repetitive oscillations of the eyes.
Nystagmus is a general term, as there are many different types of nystagmus, and many more causes of nystagmus.
Acquired nystagmus, that is, nystagmus that presents in later childhood or adulthood, has a myriad of potential causes.
www.eyemdlink.com /Condition.asp?ConditionID=303   (399 words)

  
 Nystagmus
Nystagmus may be present at birth (congenital) or acquired later in life.
Nystagmus may be inherited, be idiopathic (no known cause), or be associated with a sensory problem; its direct cause is an instability in the motor system controlling the eyes.
It also may accompany a number of eye disorders and neurological disorders, be caused by an accident, or be a reaction to alcohol and certain drugs.
www.uic.edu /com/eye/PatientCare/EyeConditions/Nystagmus.shtml   (111 words)

  
 Nystagmus Network UK - What is nystagmus?
Nystagmus is characterised by an involuntary movement of the eyes, which often seriously reduces vision.
Depth of field vision is reduced by nystagmus with a result that sufferers may be prone to tripping or clumsiness.
Nystagmus may be inherited or result from a sensory problem.
www.nystagmusnet.org /Info_WhatIsNystagmus.htm   (627 words)

  
 Horizontal Gaze Nystagmus in a Los Angeles Drunk Driving Case
The "horizontal gaze nystagmus" test, is a relatively recent development in DUI investigation.
The officer attempts to estimate the angle at which the eye begins to jerk ("nystagmus" is medical jargon for a distinctive eye oscillation); if this occurs sooner than 45 degrees, it theoretically indicates a blood-alcohol concentration over.05%.
Because of this and the fact that the test is not accepted by the medical community, it is not admissible as evidence in many states; it continues, however, to be widely used by law enforcement.
www.drunkdriving-california.net /horizontal_gaze_nystagmus.html   (842 words)

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