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Table 2 Rating scale of eye movements in neutral head position

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

Rating

Definition

0 = negative

Smooth, precise, fast eye movements, fast change of gaze direction, head remains stable

1 = moderately positive

Slightly irregular eye movements. Short stops before changing gaze direction. Head slightly unstable

2 = strongly positive

Eye movements clearly slower or irregular. Prolonged maintenance of gaze direction before changing direction. Obvious head movement. Test cannot be performed