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Nystagmus can be classified depending upon the type of motion of the eyes. In pendular nystagmus the speed of motion of the eyes is the same in both directions. In jerk nystagmus there is a slow and fast phase.
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What is the difference between strabismus and nystagmus?
Strabismus is crossed-eyes, not shaking where as nystagmus is involuntary movements or they called it "dancing eyes" or shaky eyes
Nystagmus?
DefinitionNystagmus refers to rapid involuntary movements of the eyes that may be:Side to side (horizontal nystagmus)Up and down (vertical nystagmus)RotaryDepending on the cause, these movements may be in both eyes or in just one eye. The term "dancing eyes" has been used in regional dialect to describe nystagmus.Alternative NamesBack and forth eye movements; Involuntary eye movements; Rapid eye movements from side to side; Uncontrolled eye movements; Eye movements - uncontrollableConsiderationsUncontrollable eye movements are involuntary, rapid, and repetitive movement of the eyes.The involuntary eye movements of nystagmus are caused by abnormal function in the areas of the brain that control eye movements. The part of the inner ear that senses movement and position (the labyrinth) helps control eye movements.The exact nature of these disorders is poorly understood.There are two forms of nystagmus:Congenital nystagmus is present at birth. This is the most common type.Acquired nystagmus develops later in life because of a disease or injury.Common CausesCONGENITAL NYSTAGMUSCongenital nystagmus is usually mild, does not change in severity, and is not associated with any other disorder.Affected people are not aware of the eye movements, although they may be noticed by a careful observer. If the movements are of large magnitude, visual acuity (sharpness of vision) may be less than 20/20. Surgery may improve visual acuity.Rarely, nystagmus occurs as a result of congenital diseases of the eye that cause poor vision. Although this is rare, an ophthalmologist should evaluate any child with nystagmus to check for eye disease.ACQUIRED NYSTAGMUSInner ear disorders such as labyrinthitis or Meniere's disease can lead to acquired nystagmus. However, the most common cause is probably toxic -- certain drugs or medication, including Dilantin (an antiseizure medication), alcohol intoxication, or any sedating medicines can harm the labyrinth.In young people, a common, serious cause of acquired nystagmus is head injury from motor vehicle accidents.In older people, a common, serious cause is stroke (blood vessel blockage in the brain).Any disease of the brain (such as multiple sclerosis or brain tumors) can cause nystagmus if the areas controlling eye movements are damaged.Home CareThere is no therapy for most cases of congenital nystagmus. Availability of treatment for acquired nystagmus will vary with the cause. In most cases, except for those caused by Dilantin or alcohol intoxication, nystagmus is irreversible.Call your health care provider ifCall your health care provider if nystagmus is detected or suspected.What to expect at your health care provider's officeNystagmus 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. If you have nystagmus due to a medical condition, these eye movements depend on the underyling cause.Your health care provider will take a careful history and perform a thorough physical examination, which will emphasize the nervous system and inner ear. The doctor may ask you to wear a pair of goggles that magnify the eyes for part of the neurological examination.Questions asked in a medical history may cover the following areas:When was it first noticed?How often does it occur?Has it ever happened before?Is it getting better, worse, or staying the same?Are there side-to-side eye movements?Are there up-and-down eye movements?What medications are being taken?What other symptoms are present?Diagnostic tests that may be performed include:CT scan of the head or MRI of the headElectro-oculography: An electrical method of measuring eye movements using tiny electrodes.Vestibular testing - recording the movements of the eyes and response to caloric stimulationThere is no therapy for most cases of congenital nystagmus. Treatment for acquired nystagmus depends on the cause. In some cases, nystagmus is irreversible. In cases due to medications or infection, the nystagmus usually goes away after the initial cause has resolved.ReferencesBaloh R. Neuro-ophthalmology. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 450.Goodwin J. Cranial nerves III, IV, and VI: The oculomotor system. In: Goetz, CG, ed. Textbook of Clinical Neurology. 3rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 9.
What are some of the symptoms of astigmatism in the eye?
Astigmatism of the eye usually involves the symptoms of blurred vision. It can also mean a person will have squinting and may soon feel tired or fatigued and suffer from headaches.
What are Symptoms of astigmatism How to treat astigmatism?
What does astigmatism mean A type of visual impairment. Due to the irregular curvature of the cornea or lens surface in the eyeball, the focal point formed by the parallel rays of light entering the eye is not in one place. Appears to see things blurry. Causes of astigmatism 1.Unequal curvature 2.Deviation of optical center 3.The refractive index varies Symptoms of astigmatism 1.Decreased vision 2.Asthenopia 3.Compensation for head position and squinting
What are the signs and symptoms of hyperopia?
Hyperopia, also known as farsightedness, is a refractive error that causes distant objects to appear clearer than nearby ones. Signs and symptoms include difficulty focusing on close-up objects, eyestrain, headaches, blurred vision, and eye fatigue. Some people with hyperopia may also experience squinting or eye discomfort while performing tasks that require near vision.
What are the symptoms of Olivopontocerebellar atrophy?
common symptoms include dysarthria (speech difficulty), dysphagia (swallowing difficulty), nystagmus (eye tremor), and abnormal movements such as jerking, twisting, or writhing. Symptoms worsen over time.
Can nystagmus be temporarily stopped in albino by giving anesthesia?
If you do a retrobulbar block, the nystagmus will stop.
Is nystagmus degenerative?
no
What are the causes of nystagmus?
There are many causes of nystagmus. Nystagmus may be present at birth. It may be a result of the lack of development of normal binocular fixation early on in life. This can occur if there is a cataract at birth or a problem.
How does Dandy-Walker syndrome look in infants?
In infants, symptoms can include irritability, seizures , vomiting, abnormal breathing, nystagmus (jerky eye movements), and slow motor development
What are the signs and symptoms of Leigh syndrome?
Signs/symptoms include failure to thrive, optic atrophy, nystagmus, pigmentary retinopathy, abnormal respiratory patterns, respiratory failure, hypotonia, psychomotor retardation, ataxia, dystonia , spasticity, brainstem lesions, and mental retardation
What is nystagmus?
Commonly, nystagmus is defined as rapid, repeated movements of the eyes. Clinically, physiological nystagmus is a type of eye movement characterized by alternating slow phase movements in one direction and Saccade-like quick phases in the other direction.
What is the difference between strabismus and nystagmus?
Strabismus is crossed-eyes, not shaking where as nystagmus is involuntary movements or they called it "dancing eyes" or shaky eyes
The nystagmus test has to do with?
The nystagmus test has to do with checking eye movement, which is not voluntary. This movement may result in limited vision. One nystagmus test, caloric reflex test is by filling up one of the ear canals with water or air. The movement of the eyes is then recorded.
What causes involuntary eye rolling up and to the right?
The symptom you describe sounds as though it might be "nystagmus." WIKIPEDIA has an article on that symptom: http://en.wikipedia.org/wiki/Nystagmus
Can people with nystagmus play the Nintendo 3DS?
Those with nystagmus may have trouble seeing the graphics in 3D. In such cases, it would be best to turn the 3D effect off.
Which parts of the brain is involved in regulation of nystagmus?
Vestibular nuclei
