nystagmus

noun

nys·tag·mus | \ni-ˈstag-məs

Definition of nystagmus

: involuntary usually rapid movement of the eyeballs occurring normally with dizziness during and after bodily rotation or abnormally following head injury or as a symptom of disease

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The doctor took one look at the young woman’s eyes and told her she had nystagmus. — Lisa Sanders, M.d., New York Times, "Why Was Her Vision Jerky and Blurry if There Was Nothing Wrong With Her Eyes?," 1 May 2018 Were the weakness, pain and nystagmus caused by the crowding in her brain? — Lisa Sanders, M.d., New York Times, "Why Was Her Vision Jerky and Blurry if There Was Nothing Wrong With Her Eyes?," 1 May 2018 Could the headaches and the nystagmus be related in some way to her E.D.S.? the parents asked. — Lisa Sanders, M.d., New York Times, "Why Was Her Vision Jerky and Blurry if There Was Nothing Wrong With Her Eyes?," 1 May 2018 Pets that eat pet food containing pentobarbital can experience drowsiness, dizziness, excitement, loss of balance, nausea, nystagmus (eyes moving back and forth in a jerky manner) and inability to stand. — Julie Washington, cleveland.com, "Smucker recalls canned dog food containing potentially lethal drug," 19 Feb. 2018 But when Jeffrey started exhibiting symptoms of nystagmus — an eye condition that causes uncontrolled repetitive eye movements — his mom, a physical therapist, knew something more serious might be involved. — Kristen Jordan Shamus, Detroit Free Press, "Teen who beat brain cancer plans to become a pediatric oncologist to help other kids," 17 June 2017 A rabbit was brought in for a dental issue, but during the exam, its eyes began jerking back and forth, a condition called nystagmus. — Andy Newman, New York Times, "The Doctor Will See Your Iguana Now," 12 May 2017 Brown said Jeffrey still struggles with nystagmus and has difficulty at times reading and typing. — Kristen Jordan Shamus, Detroit Free Press, "Teen who beat brain cancer plans to become a pediatric oncologist to help other kids," 17 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nystagmus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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The first known use of nystagmus was in 1772

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nystagmus

noun

nys·tag·mus | \nis-ˈtag-məs

Medical Definition of nystagmus

: involuntary usually rapid movement of the eyeballs (as from side to side) occurring normally with dizziness during and after bodily rotation or abnormally following head injury or as a symptom of disease