Vision Advantage


The Bertec Vision Advantage (BVA) identifies dysfunction in the vestibular ocular reflex (VOR) per the Dynamic Visual Acuity Test. The BVA provides a more objective test than the standard clinical DVA test using an eye chart. The BVA also includes a Gaze Stability Test that identifies when the VOR falls below normal limits and whether there is an asymmetry between the left and right side. These advanced capabilities allow the clinician to customize treatment to the patient, resulting in optimal patient outcomes.

  • Wireless and light weight head tracker

  • Next generation VOR assessments

  • Patient-specific baseline comparison

  • Automatic sensor calibration

  • New technology allows for unrestricted patient movements and more flexibility for clinicians

  • Optimal patient outcomes


Next generation VOR assessments

Do your patients have the optimal eye and head coordination to maximize their performance? Find out using the Bertec Vision Advantage system, which identifies dysfunction in the vestibular ocular reflex (VOR) per the Dynamic Visual Acuity (DVA) Test and measures the head velocity, axis, and direction where visual accuracy breaks down per the Gaze Stabilization Test (GST).


Wireless and lightweight

Eliminating the need for long, unruly cords, the wireless and lightweight head-worn sensor ensures that your patient’s head movement is un-hindered and free-moving. The sensor is designed to detect head movement in all directions, so our software can distinguish whether a patient’s head is moving correctly for each test.


Portable and convenient

The Bertec Vision Advantage’s portable design allows your facility to use the system in multiple locations to improve patient workflow.

Ready to learn how we can support your work?

Standard Package

Wireless, lightweight head-worn sensor

Bertec Vision Advantage Software

Touch screen display and remote control

Wireless-computerized VOR training exercises with selectable controls for velocity and direction of head movement

Computerized Gaze Stabilization (GST) and Dynamic Visual Acuity (DVA) tests

Headband: adjustable elastic band

Triaxial gyroscope, accelerometer and compass sensors

Dedicated product case for portability and storage of system

Online educational product videos for clinician

Assessment Protocols

Visual Processing Time (VPT) – this quick screen ensures the patient can process the optotype (letter “E”) stimuli quickly enough to use DVA and GST protocols accurately and reliably.

Baseline Visual Acuity (BVAT) measures a patient’s visual acuity with the head stationary. The results are then used for comparison to visual acuity while the head is moving during DVA and GST protocols.

Dynamic Visual Acuity (DVA) provides an assessment of the smallest character the patient can identify accurately while the head is moving at a specific and constant velocity. Data can be collected for any axis of rotation (yaw, pitch, or roll) and are analyzed and reported for each direction of rotation separately. Results indicating significant loss of visual acuity in one or both directions are considered an indication of VOR impairment.

Gaze Stabilization Test (GST) measures the head velocity, axis, and direction where visual accuracy breaks down. Results provide insight into a patient’s effective use of VOR as it relates to functional demands for activities of daily living, and clinicians can use the data to make training decisions and document progress.

Patient Training uses computerized VOR training to simulate gaze stabilization X1 exercises, with selectable controls for velocity and direction of head movement. Training exercises are customized to patient performance on DVA and GST and can be programmed to progress through varying levels of challenge depending on patient’s successful completion. Progress reports are automatically stored for printing.


Head rotation can be measured in yaw, pitch, and roll planes

Modular software design to fit your needs

Multiple Axis of Rotation

Wireless Inertial Measurement Unit (IMU)

Sampling Frequency: 175 Hz

Communication Range: Up to 20 feet +

Charging device: USB cable

Use per charge: Up to five hours

Battery: Rechargeable lithium-polymer

Patented and HIPAA compliant patient database with merge and sync capabilities across all Bertec® Balance Advantage® products

Recommend use with surgical bonnets (package of 100 supplied with purchase)