Balance Testing - VORTEQ® and
DVA-Test
VORTEQ® is designed to provide information about the Vestibular Ocular Reflex (VOR) in patients with dizziness or balance problems. VORTEQ® offers researchers and clinicians a simple and inexpensive method to evaluate VOR gain, phase and symmetry. The Dynamic Visual Acuity (DVA) Test measures visual acuity during head motion. The DVA-Test provides valuable information about the Visual Vestibular Ocular Reflex (VVOR) in well subjects (pilots, athletes) in addition to patients with vestibular deficits. Technology VORTEQ® utilizes an angular velocity sensor mounted directly to the FireWire Binocular Goggles. With the Monocular Goggles, the angular velocity sensor is attached to the back of the goggles headband for VORTEQ® testing and to the front of a separate headband for DVA testing. This patented solid state sensor produces an electronic waveform that is proportional to head angular velocity (deg/sec). Specialized software allows you to conduct the following tests at the specified velocity ranges: • Vestibular ocular reflex (VOR) (± 500 degrees/second) • Visual enhanced VOR (VVOR) (± 500 degrees/second) • Dynamic visual acuity (DVA) (± 250 degrees/second) Comparisons between static and dynamic acuity at selected test frequencies can be quickly evaluated. The DVA-Test is scored using the log Mean Angle Resolvable (logMAR) scale that allows visual performance scores to be precisely quantified and statistically analyzed. Configuration VORTEQ® and DVA-Test are bundled together and sold as a compliment to the VisualEyes Video ENG. VORTEQ® and DVA-Test can be configured for single monitor and monitor with LCD Projector systems. Rehabilitation VORTEQ® is particularly useful for serial testing to help quantify VOR improvements during Vestibular Rehabilitation Therapy (VRT). For More Information For more information on the DVA Test and Visual Acuity, click here to read Vestibular Update Issue 20. Download the following movie to watch a VORTEQ® test be performed: Vorteq_Demo.wmv (7.2 MB) Download the following clip to watch a DVA test performed: DVAT_Video.wmv (7.6 MB)
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