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.
This is what causes the eye to turn either inward or outward and prevents the eyes from working in tandem. Abnormalities â In some cases amblyopia is caused by an abnormality like childhood cataracts, an abnormal central retina, an abnormal eye shape or a difference in eye size.