Active Head Rotation

The Perfect Combination for Active Head Rotation Diagnostics

VORTEQ®

High Frequency VOR Test Equipment

Dynamic Visual Acuity Test

Science

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 a headband mounted angular velocity sensor. 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 a velocity range of ± 500 degrees/second:

• Vestibular ocular reflex (VOR)
• Visual enhanced VOR (VVOR)
• Visual Suppression of VOR (VSVOR) - A headband mounted laser for suppressing VOR is available as an option

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.

Video Based VORTEQ

Allows simultaneous observation of your patient's eye movements and collection and analysis of eye movement waveforms during VORTEQ® testing.  The rate sensor clips to the back of the Binocular Goggles and Monocular Goggles.

DVA Testing

The patient wears a headband with the angular rate sensor mounted on the front of the VORTEQ® headband.  The VORTEQ® rate sensor's cable is draped behind the patient's ear and secured with Velcro®.

Configuration

VORTEQ® and DVA-Test are bundled together and can be sold as a stand alone system or as a compliment to the VisualEyes Video ENG. VORTEQ® and DVA-Test can be configured for single monitor, dual-monitor, and monitor and 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® Test (5.62 MB)

Download the following clip to watch a DVA test performed:

DVA-Test (7.73 MB)

VORTEQ® / DVA-Test™ Brochure