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©2013 UpToDate ® Print Email Functional assessment of older drivers Function Test Acceptable findings Muscle strength, grip strength Dynamometer for hand grip >35 lb grip strength in dominant hand Mobility Get up and go test; functional reach test; range of motion in shoulder, neck, and wrist 15 seconds; reach 6 inches from starting point; watch rise from chair, turn and use of arms, height of steps Hearing Whisper test Able to distinguish sounds Visual acuity and attention, peripheral vision Snellen eye chart or Rosenbaum pocket vision card; useful field of view (UFOV); visual fields 20/40 in better eye; >120 degrees Cognitive function, judgement, attention, visual-spatial Mini mental state exam (MMSE); hexagon drawing on MMSE 23 out of 30, <23 stop driving until further testing done; copy design with sides intersecting Adapted from Abrams, WB, Beers, MH, Berkow, R, The Merck Manual of Geriatrics, Second Edition, 1995, Whitehouse Station, NJ.