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.
Bulging of one eye, especially in a child, is a very serious sign. It should be checked right away. Hyperthyroidism (particularly Graves disease) is the most common cause of bulging eyes. With this condition, the eyes do not blink often and seem to have a staring quality. Normally, there should be no visible white between the top of the iris (the colored part of the eye) and the upper eyelid. Seeing white in this area most often is a sign that the eye is bulging.