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 (să-käd′, sə-)
A rapid intermittent eye movement, as that which occurs when the eyes fix on one point after another in the visual field.

[French, jerk, jolt, from Middle French, from Old French dialectal saquer, to jerk, pull, variant of Old French sachier, to pull forcefully, turn over, shake up, from sac, sack (perhaps in reference to the shaking of bags of wheat to settle their contents); see sac1.]

sac·cad′ic adj.


(səˈkɑːd; -ˈkeɪd)
1. (Physiology) the movement of the eye when it makes a sudden change of fixation, as in reading
2. (Horse Training, Riding & Manège) a sudden check given to a horse
[C18: from French: a jerk on the reins of a horse]



a rapid, irregular eye movement that occurs when changing focus from one point to another, as while reading or looking out from a moving train.
[1950–55; < French saccade jerk, jolt < Middle French saqu(er) to pull violently]
sac•cad′ic, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.saccade - a rapid, jerky movement of the eyes between positions of rest
eye movement - the movement of the eyes
2.saccade - an abrupt spasmodic movement
movement, motility, motion, move - a change of position that does not entail a change of location; "the reflex motion of his eyebrows revealed his surprise"; "movement is a sign of life"; "an impatient move of his hand"; "gastrointestinal motility"
References in periodicals archive ?
Certain features of the phantom array have remarkable theoretical implications regarding the nature of the shift of retinal local signs that accompanies a saccadic eye movement.
Similar to the saccadic eye movement, the outcome measure was a pass or fail score based on the percentage of the correct responses (i.
Quick phases are saccadic eye movements that tend to reset eye position and are mostly in the opposite direction--but not always (see dot).
Farris, president and chief executive officer, said, "Our new higher-repetition rate laser head coupled with our prototype tracking system - which compensates for the saccadic eye movements that occur during surgery - attracted the most attention.
This training incorporates saccadic eye movements and near-to-far focusing skills to reduce difficulty while reading [6] (Appendix 3, available online only at http://www.
Hence, the basal ganglia, including the substantia nigra, and frontal cortex may be involved in the production of defective saccadic eye movements in MSA while the cerebellum may be implicated in the abnormal VOR, which is of particular interest in MSA (see next article in the series).
Rather than use fixation and saccadic eye movements, the subjects were taught to scroll printed reading exercises so that the words moved into the TRL field of view.
The LADARVision(R) eye tracker is the only known eye tracker capable of tracking human saccadic eye movements during excimer laser surgery.
Centring--to improve pursuit & saccadic eye movements, convergence, and accommodation
Versional eye movements can be smooth pursuit or saccadic eye movements.