[Effect of tilting on cyclodeviation in nine diagnostic positions of gaze in normal subjects with Awaya's New Cyclo Tests].
We measured cyclodeviation in all nine diagnostic positions of gaze in normal subjects with the New Cyclo Tests and phase difference haploscope. Measurements with the New Cyclo Tests were carried out in the upright posture, and head tilt 15 or 30 degrees to the right or left. Measurements with the phase difference haploscope were carried out in the upright posture with or without the fusional background. Cyclodeviation in all nine diagnostic positions of gaze measured with the New Cyclo Tests in the upright posture was similar to that measured with phase difference haploscope under the fusional background. Both tests showed that excyclodeviation was significantly greater in upward, right-upward and left-upward gaze than in the primary position. It is concluded that cyclodeviation measured with the New Cyclo Tests is not affected by cyclophoria. The amount of excyclodeviation measured with New Cyclo Tests showed no difference between head tilt postures. We suggest that the effects of head tilting on cyclodeviation could be compensated by the corresponding effect on cyclotorsion of both eyes in normal subjects.
D000328:Adult; D005133:Eye Movements; D006801:Humans; D008297:Male; D011187:Posture; D013285:Strabismus / Q000175:diagnosis; D014787:Vision Tests