Dynamic Visual Acuity

𝗢𝗿𝗶𝗴𝗶𝗻𝗮𝗹 𝗗𝗲𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻: After assessing static binocular visual acuity, dynamic visual acuity (DVA) is determined by repeating the test during horizontal and vertical head shaking at 2-3 Hz. Dynamic visual acuity is most important to test when bilateral vestibular loss is suspected. A loss of at least 4 lines is typical of bilateral vestibular loss (generally horizontally and vertically), and normal patients without vestibular loss should not lose more than 1 line or so on the acuity chart. Patients with unilateral vestibular loss may loss 2-3 lines on the acuity chart (usually horizontal DVA is more impaired than vertical DVA), and this can vary with the chronicity and degree of vestibular loss. 𝗡𝗲𝘂𝗿𝗼-𝗼𝗽𝗵𝘁𝗵𝗮𝗹𝗺𝗼𝗹𝗼𝗴𝘆 𝗮𝗻𝗱 𝗡𝗲𝘂𝗿𝗼-𝗼𝘁𝗼𝗹𝗼𝗴𝘆 𝗧𝗲𝘅𝘁𝗯𝗼𝗼𝗸 𝗟𝗲𝗴𝗲𝗻𝗱: After assessing static binocular visual acuity, dynamic visual acuity (DVA) is determined by repeating the test during horizontal and vertical head shaking at 2-3 Hz. Dynamic visual acuity is most important to test when bilateral vestibular loss is suspected. A loss of at least 4 lines is typical of bilateral vestibular loss (generally horizontally and vertically), and normal patients without vestibular loss should not lose more than 1 line or so on the acuity chart. Patients with unilateral vestibular loss may loss 2-3 lines on the acuity chart (usually horizontal DVA is more impaired than vertical DVA), and this can vary with the chronicity and degree of vestibular loss https://collections.lib.utah.edu/details?id=1307318. (Video and legend created with the assistance of Dr. Tony Brune and Justin Bosley)