Top 10 VisualEyes™ 3.2 features for Physical Therapists

14 August 2025

VisualEyes 3.2 represents a significant advancement in the field of physical therapy, offering a suite of powerful tools designed to enhance the accuracy and efficiency of patient assessments.

Below, we’ll explore the top 10 features that make VisualEyes 3.2 an ideal tool for evaluating physical therapy patients.

1. VORTEQ™ Functional Assessments

If you already own a VNG system or only require the ability to perform functional VOR testing, we’re glad to offer VORTEQ Functional Assessments, which is a standalone bundle allowing you to perform the following tests:

This bundle only uses the VORTEQ IMU sensor attached to a headband to measure the patient’s head velocity during the tests.

2. fvHIT™

fvHIT is a functional assessment of the vestibulo-ocular reflex (VOR) in response to quick head impulses. This test is similar in technique to the Video Head Impulse Test (vHIT), where the patient receives randomized, quick head impulses in each of the canal directions (lateral, LARP, RALP).

However, in the fvHIT test, the patient responds with the direction of the optotype across a broader spectrum of head speed/frequency than what is assessed in the vHIT. We know that vestibular and VOR dysfunction is a spectrum, and fvHIT allows you to see where on the spectrum of function your patient is performing.

3. DVA graphing changes

To match the GST, we have implemented bar graphs for DVA testing. This makes it easier to compare DVA to GST results. When you add normative data to your system, you will see the ‘gray bars’ pop up on the results when the user performs outside of normal limits.

Static acuity of minus 0.3 for both left and right. This remains the same in the right side for DVA, but increases by six steps, or 0.6, in the left side, with anything above a two-step increase being abnormal. — **Figure 1:** Abnormal left moving DVA results. Notice the ‘gray bar’ displaying the abnormal region.

4. Visual Processing Time (VPT) test

Before DVA, GST and fvHIT, we now test for VPT. This test presents the optotype two lines above the static acuity number and varies the time that the stimulus flashes on the screen. As the patient gets correct responses, the stimulus flash time will get progressively shorter.

The lowest VPT result is 30 ms. Any response over 70 ms is invalid and you should interpret any following results in the DVA, GST, and fvHIT tests with caution.

5. Exact degree of head position

Our 3D head model (used in Advanced Dix-Hallpike and Lateral Head Roll testing) now includes exact degree of head position for accurate testing.

Alongside eye position and torsion SPV graphs, a 3D head model displays the exact degree positioning in the horizontal and vertical channels. — **Figure 2:** 3D head model guide with exact degree positioning.

6. Torsion for the Lateral Head Roll test

We have added the torsion eye graph to the Lateral Head Roll test (in VORTEQ Assessments) to better help distinguish between central and peripheral cases.

Eye position graphs in degrees as a function of time for horizontal, vertical, and torsion right and left. There is also a 3D head model displaying the current head position and in which position the head should be turned. Finally, there is a torsion SPV graph. — **Figure 3:** Data that is recorded and plotted for the Lateral Head Roll test using VisualEyes.

7. Automatic Test Start

For Advanced Dix-Hallpike and Lateral Head Roll testing, you now have the option for the test to automatically begin when your patient is in the correct position. This allows for button-free starts so your hands can remain on the patient.

Basic settings for the Advanced Dix-Hallpike, allowing users to tick or de-tick Automatic Test Start. — **Figure 4:** Automatic Test Start.

8. Pause Advanced Dix-Hallpike and Lateral Head Roll testing

You can also now pause between test sections, allowing you to move your patient without getting artifact of movement in the data recording. You can initiate recording by clicking the remote, the button (on top mount goggles), the enter button on the keyboard, or clicking ‘Resume’ on the computer screen (using the computer mouse or touchscreen).

**Figure 5:** To resume testing, press the white highlighted ‘Resume’ button.

9. Diagonal optokinetic stimulus

With some research pointing toward using habituation with different speeds and directions of the optokinetic stimulus, we have enabled diagonal optokinetic testing in the Research Module. The stimulus speed and direction can be changed in real time to match your patient’s needs.

10. Cervical-Ocular tests

VisualEyes 3.2 includes two new Cervical-Ocular tests, which are available in VisualEyes 525 and recommended to use with our VORTEQ sensor:

Expanding upon the traditional variants of these tests, Cervical Gaze and SPNT testing can help you to assess neck contributions to your patient’s performance and symptoms (for example post head injury or falls), providing objective data to complement any bedside tests you may be performing.

Clinician performing Gaze test in a patient. The patient is sat in the Orion Reclining rotary chair and fixated with VisualEyes VNG goggles, looking toward a dot projected onto a wall. Their body is facing 45 degrees to the right of the stimulus, and the clinician is turning the patients head 45 degrees to the left to look at the stimulus. The positioning is the same for the Smooth Pursuit Neck Torsion test. — **Figure 6:** VisualEyes Gaze test in the body right, head left position.

Advancing the possibilities for evaluating physical therapy patients

To learn more about how the field of physical therapy can benefit from Videonystagmography (VNG) and functional VOR testing, please discover VisualEyes 3.2.

Dr Liz Fuemmeler

Dr. Liz Fuemmeler is the Balance Clinical Product Manager with Interacoustics and Vestibular Program Director at Professional Hearing Center in Kansas City, MO. She graduated with her Doctorate of Audiology in 2019 from Purdue University and received specialty training in vestibular and balance disorders at Boys Town National Research Hospital and the Mayo Clinic. She is actively involved in vestibular and concussion research and regularly lectures for local, national, and international conferences. Outside of her role with Interacoustics, she co-hosts a monthly podcast called "A Dose of Dizzy'' that reviews current vestibular protocols and research. She also is the past-president of the Missouri Academy of Audiology and volunteers with the American Academy of Audiology.

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Published: 14 August 2025

Modified: 04 December 2025