The circular eye-tracking test. I. Simultaneous recording of the horizontal and vertical component of eye movement in the eye-tracking test.
Almost all of the conventional clinical reports on the eye-tracking test are made on the horizontal component of the smooth pursuit function of oculomotor system; few are made on the vertical component. One reason is that during the conventional vertical eye-tracking test the artifacts caused by movement of the upper eyelids often make it difficult to analyze the data. To overcome this problem the authors have developed a method to record simultaneously the horizontal and vertical components of eye movement in the eye-tracking test, and moreover, to reduce artifacts as much as possible. Our method, the circular eye-tracking test, is performed by means of an apparatus that provides a visual stimulus drawing a circle clockwise, at a rate of 120 degrees/sec, with a radius of 25.5 cm, and viewed at a distance of 70 cm.
D001927:Brain Diseases / Q000150:complications / Q000175:diagnosis; D004584:Electronystagmography / Q000295:instrumentation* / Q000379:methods; D004585:Electrooculography / Q000295:instrumentation* / Q000379:methods*; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008526:Medulla Oblongata / Q000503:physiopathology; D009759:Nystagmus, Pathologic / Q000209:etiology; D009904:Optical Rotation; D010985:Platybasia / Q000150:complications / Q000175:diagnosis; D012438:Saccades; D014724:Vestibular Function Tests / Q000379:methods; D014722:Vestibule, Labyrinth / Q000503:physiopathology