Measurement of head-turn in ocular torticollis

There is a need for a simple and accurate method to measure head-turn in patients who suffer from torticollis secondary to ocular disease. In the technique described here, a fixation object is moved from a point in front of the patient to a point at which the patients face is straight. The distance that the object is moved is proportional to the amount of headturn the patient has. With a simple mathematical calculation, the angle of head-turn can be determined, even during a routine clinical evaluation. [Ophthalmic Surg Lasers 1997;28:424-425.]