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Definition

Nystagmus is a rapid, involuntary, motion of the eyeball (side to side, up and down, rotating and/or oscillating).

Nystagmus can be caused by tumors or drugs (such as barbiturates). It can also be a congenital condition (present at birth).

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SDS Relevance

Exposure to certain chemicals can cause nystagmus, particularly psychoactive substances such as sedatives and antiseizure medications, although there are many other more common causes; see Further Reading below for more information. This condition is very easy for other persons to observe and can be very disturbing if one has never seen the condition before. Be certain you read the Safety Data Sheet for all chemicals that you are working with and look closely at Section 11 (toxicological information) of the SDS which will list the signs and symptoms of exposure.

As always, take proper precautions to limit your exposure to such materials. Section 8 (exposure controls/personal protection) of the SDS will contain information on personal protective equipment (PPE), as well as appropriate engineering controls that will assist you in this goal.

Further Reading

• Making Sense of Acquired Adult Nystagmus a physician-oriented article from the American Academy of Ophthalmology.
• Nystagmus at the American Academy of Ophthalmology includes extensive information and an animated gif illustrating the condition.
• Causes of Uncontrolled Eye Movements and When to Seek Help at Healthline.com.
• Nystagmus: Involuntary eye movements at All About Vision
• American Nystagmus Network.
• Overview of Nystagmus at the American Optometric Association.
• Nystagmus, a YouTube presentation by Dr. Murali Chand Nallamothu.

See also: conjunctivitis, iridocyclitis, eye wash, sclera.

Additional definitions from Google and OneLook.

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