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What (who) is optokinetic nystagmus - definition

EYE PHENOMENON

Optokinetic tracking; Optokinetic nystagmus; Optokinetic system; Optokinetic reflex

Amaurotic nystagmus

THE NYSTAGMUS ASSOCIATED WITH BLINDNESS OR THE CENTRAL VISION DEFECTS.

Visual Deprivation Nystagmus; Amblyopic Nystagmus

Amaurotic nystagmus is defined as the nystagmus associated with blindness or the central vision defects. It is characterized by the pendular or jerky movements of the eyes in the patients who have visual impairment for a long period of time.

https://en.wikipedia.org/wiki/Amaurotic_nystagmus

Pendular nystagmus

A SINUSOIDAL OSCILLATION, WHICH REFERS TO THE WAVEFORM OF INVOLUNTARY EYE MOVEMENTS THAT MAY OCCUR IN ANY DIRECTION.

Acquired pendular nystagmus

Pendular nystagmus is a sinusoidal oscillation, which refers to the waveform of involuntary eye movements that may occur in any direction. It is characterized by the multidimensional slow eye movements of the eyes (1 Hz frequency) with an equal velocity in each direction that resembles the trajectory of a pendulum.

https://en.wikipedia.org/wiki/Pendular_nystagmus

Nystagmus

CONDITION OF INVOLUNTARY EYE MOVEMENT

Pathologic nystagmus; Nystagmus, pathologic; Nystagmus, congenital; Nystagmus, physiologic; Nystagmus, optokinetic; Physiologic nystagmus; Nostagmus; Nystagmic; Horizontal gaze nystagmus test; Central positional nystagmus; Jerk nystagmus; Right-beating nystagmus; Left-beating nystagmus; Central nystagmus; Infantile nystagmus; Periodic alternating nystagmus; Rotatory nystagmus; Horizontal gaze nystagmus; Nestagmus; Involuntary eye movement; Congenital nystagmus

·noun A rapid involuntary oscillation of the eyeballs.

Wikipedia

Optokinetic response

The optokinetic response (OKR) is a combination of a slow-phase and fast-phase eye movements. It is seen when an individual tracks (pursuit movement) a moving object with their eyes, which then moves out of the field of vision, a point at which their eyes move back to the initial position (saccade movement) when they first saw the object. The reflex develops at about 6 months of age.

Optokinetic nystagmus/response (OKN/R) is nystagmus that occurs in response to a visual stimulus on the retina. It is present in normally developed patients. The optokinetic response allows the eye to follow objects in motion when the head remains stationary (e.g., observing individual telephone poles on the side of the road as one travels by them in a car, or observing stationary objects while walking past them).

https://en.wikipedia.org/wiki/Optokinetic response