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.
1 Myopia (Nearsightedness). 2  Myopia is blurred vision that occurs when the eye's focusing mechanism brings light to a focus in front of the retina, usually because the eyeball is very elongated in shape. 3  Eyeglasses or contact lenses correct myopia but do not slow or alter its progression.