noun. 1  a. An old French dance resembling the gavotte, usually in 3/4 or 2/2 time beginning with an upbeat. 2  A movement in ballet in which the dancer transfers body weight quickly from foot to foot, usually on the balls of the feet, in a series of small steps.
Nystagmus is a condition where the eyes make repetitive movements. The eyes can jerk exclusively in one direction, or make back and forth movements. With nystagmus, the eye can look jittery and can affect both eyes or just one eye.
If you have strabismus, one eye looks directly at the object you are viewing, while the other eye is misaligned inward (esotropia, crossed eyes or cross-eyed), outward (exotropia or wall-eyed), upward (hypertropia) or downward (hypotropia). Strabismus can be constant or intermittent.