Nystagmus

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File:Vestibular01.jpg
Typical head tilt in a DSH female with Vestibular syndrome and secondary nystagmus

Nystagmus is a neurological disease where there is an involuntary movement of one of both eyes. Normal (physiological nystagmus) is common in certain breeds such as Siamese and is an incidental finding during examination.

Nystagmus is defined as eye movement where there is alternating smooth pursuit in one direction and saccadic movement in the other direction. It can result in clinical symptoms such as vomiting, ataxia and head tilt.[1][2].

In pathological nystagmus, primary disease results in nystagmus as a secondary symptom. Differential diagnosis for the causes of pathological nystagmus[3] includes:

In young kittens

In adult cats

In geriatric cats


  1. Wikipedia.org
  2. Norsworthy et al, 1998 The Feline Patient. Lippincott Williams & Wilkins
  3. Vin.com