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Table 3 Rating scale of gaze stability

From: Head-Eye movement control tests in patients with chronic neck pain; Inter-observer reliability and discriminative validity

Rating Definition
0 = negative Gaze stable. Smooth, well-coordinated, precise and fast movement of the head, fluent change of head movement direction
1 = moderate positive Gaze stable. Slightly irregular head movement
2 = strong positive Gaze repeatedly unstable. Head movement slow and irregular