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Behavioral Assessment of Vestibulo Ocular Reflex

BalanceEye DVA with a head mounted high frequency inertia measurement unit (IMU)  can assess dynamic visual acuity in relation to baseline static visual acuity in all planes of head movement (yaw, pitch roll, right anterior – right posterior and left anterior – left posterior).

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Why DVA?

Conventional provocative tests for vertigo like caloric test, video head impulse test (vHIT) and vestibular evoked myogenic potentials (VEMP) aid in diagnosing site of lesion and do not test degree of impairment. During recovery from vertigo, the initial compensation prevents nystagmus at rest. Compensation during movement occurs later. The effect of compensation is best assessed by the dynamic visual acuity test (DVA). This measures the ability of the VOR (Vestibular Ocular Reflex) to compensate for retinal slip during head
movements.

Key Features

  • Light weight head mounted rotational acceleration detectors.

  • Horizonal, pitch, LARP and RALP plane modes.

  • Provision to test and record individual eyes 

    separately.
  • Intuitive reporting.

  • Amazingly fast threshold search algorithms 

    allowing rapid completion of the test.
  • Standardized optotypes.

  • Remote handheld device to capture patient responses.

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Tests

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Application Areas

  • Vestibulopathy unilateral or bilateral.

  • Traumatic brain injury.

  • Alzheimer's and other such cognitive disorders.

  • Sports - it is one of the best indicators of success in certain sports specialties like table tennis, baseball etc.

  • Rehabilitation, and training in sports and trauma and cognition.

  • Fatigue and sleep.

  • Drug effects (narcotic etc).

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