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.
Strabismus is a condition in which the eyes are not aligned correctly. While one eye looks at the target, the other eye is looking in a different direction. Esotropia is a type of strabismus where the straying eye is crossed inwards. Exotropia is another type of strabismus where the straying eye is drifting outwards.