Nystagmus is diagnosed by an ophthalmologist. They will examine the inside of your eyes and test your vision. Your ophthalmologist will also look for other eye problems that may be related to nystagmus. These problems could include strabismus (misaligned eyes), cataracts (clouding of the eye’s lens), or a problem with the eyes’ retina or optic nerve.
One way to see nystagmus is to spin a person around for about 30 seconds, stop and then have them try to stare at an object. If they have nystagmus, their eyes will first move slowly in one direction, then move rapidly in the opposite direction.
Other tests that may be used to diagnose nystagmus are:
- eye-movement recordings (to confirm the type of nystagmus and see details of the eye movements)
- an ear exam
- a neurological exam
- tests to get images of the brain, including computerized tomography (CT) and magnetic resonance imaging (MRI)