VAT/DVA Testing
Vestibular Autorotation Testing (VAT) is used to quickly evaluate the vestibulo-ocular reflex (VOR) by testing the horizontal and vertical canals. Patients perform natural everyday motions by shaking their head in the ‘yes and no’ positions. The test outcome helps our audiologists design a customized treatment plan specific to our patient’s needs.
Dynamic Visual Acuity Testing (DVA) is a computerized method of determining the level of visual blurring induced by head movement in the horizontal or vertical planes. Unlike VAT testing, dynamic visual acuity is a method of evaluating the functional, rather physiologic integrity of the vestibulo-ocular reflex. The disadvantage of DVA testing is that the left or right inner ears cannot be isolated during testing. Like the VAT, the DVA cannot distinguish between posterior and superior canal function.