ocular bobbing

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oc·u·lar bob·'bing

sudden conjugate downward deviation of the eyes with a slow return to the normal position; seen in some comatose patients who have bilateral hemisphere lesions.
Farlex Partner Medical Dictionary © Farlex 2012

bobbing, ocular 

Spontaneous, rapid downward movements of both eyes followed by a slow drift to the straight-ahead position. It occurs in patients, usually comatose, who have lesions of the brainstem.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

oc·u·lar bob·bing

(okyū-lăr bobing)
Sudden conjugate downward deviation of eyes with slow return to normal position.
Medical Dictionary for the Dental Professions © Farlex 2012