When you are choosing the equipment, you need to consider the features of the equipment, the quality of the devices you are considering, and how easy it is to use. Also, consider what features are most important. For example, do you want a two-channel system with one camera or a four-channel system with two cameras?

As mentioned, the testing will take about an hour. In most cases, a clinic is only going to need to have one of these machines in place, as they will still be able to test several patients a day with no issues. However, those that have large clinics may want to consider renting or leasing more than one.

The tests tend to be quite simple. The patient will wear a pair of goggles on their eyes. Those goggles will monitor the eye movement and record it. The test will typically take about an hour to complete, and the results will help to determine whether there is an inner ear issue. If there is, the doctors can use the information to make their diagnosis and their treatment plan for the patient. The tests, even though they might take an hour, are noninvasive, and most patients will not have a problem with them. 

Patients who undergo a VNG test, or videonystagmography test, are having their inner ear checked to help pinpoint the cause of their loss of balance or dizziness. The tests check the vestibular system of the body, which is the balance system located in the inner ear. They want to discover whether the patient is suffering from balance problems because they have an abnormality in the inner ear.

Some of the medical manufacturing companies creating this type of testing equipment today include Balance, Euroclinic, Synapsys, Gaes Medica, Natus, Interacoustics, Biomed, and Vesticon.