Definition of saccades:
(n) :
A rapid jerky movement of the eye (voluntary or involuntary) from one focus to another.
(v) :
(of the eye, intransitive) To make a rapid jerking movement to focus elsewhere.
(n) :
The act of checking a horse quickly with a single strong pull of the reins.
(n) :
(music) The sounding of two violin strings together by using a sudden strong pressure of the bow.
(n) :
(rare) A sudden jerking movement.