XY Laser Projector
A focused solid state laser with precise, dual galvanometers produces a red dot on the booth wall for gaze, pursuit, and saccade tests in both the vertical and horizontal directions. For subjective visual vertical (SVV) tests these XY galvanometers oscillate rapidly to draw a red line on the booth wall. As a measure of static otolith function, via the perception of verticality, the patient tells the examiner to rotate the laser line left or right until it appears to be vertical. For patients who have difficulty sitting up straight due to back or neck issues, there is a forward adjustable head support with an integral distance ruler to correctly set the laser calibration angle.
Binocular Video Goggles
Prior to testing, binocular goggles are placed on the patient’s face, both eye images are adjusted for clarity of image, a Velcro strap connects the goggles to the head support for head stability. Then via software, the eye images are centered on the computer screen. During testing, even when the patient slouches in their chair or sits straighter, the eye images can be centered and the tracking adjusted from the computer keyboard without re-entering the booth. These goggles features improve trace quality and also reduce testing time.