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.
Cataract Symptom: Double Vision. Sometimes, cataracts can cause double vision (also known as diplopia) when you look with one eye. This is different from the double vision that comes from the eyes not lining up properly. With cataracts, images appear double even with one eye open.