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Dynamic visual acuity (DVA)

DVA may be a useful indicator of the function of the VOR

Dynamic visual acuity (DVA)

Dynamic visual acuity (DVA) may be a useful indicator of the function of the vestibulo-ocular reflex (VOR) but most DVA tests involve active head motion in the yaw plane. During gait the passive, vertical VOR may be more relevant and passive testing would be less likely to elicit compensatory strategies. The goal of this study was to determine if testing dynamic visual acuity during passive vertical motion of the subject would differentiate normal subjects from patients with known vestibular disorders. Subjects, normals and patients who had been diagnosed with either unilateral vestibular weaknesses or were post-acoustic neuroma resections, sat in a chair that could oscillate vertically with the head either free or constrained with a cervical orthosis..

Facilities Available


VNG

Video Nystamography basic test to find out cause of vertigo & dizziness

SVV

Straight Visual Vertical Test Assessment of ocular function important in maintaining balance.

CCG

Cranio Carpography Assessment of gait abnormalities associated with vertigo & rule out lesions in brain.

DVA

Dynamic Visual Acuity

ENG

Electro Nystagmography

Caloric Test

Useful assessment of labyrinthine functions