re: Field sobriety tests aren't designed for you to pass.

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Did you know that normal smooth pursuit (eyes following a target like a moving finger smoothly) typically only are accurate up to 30deg/sec and the eye uses saccadic eye movements (abrupt jump to catch up) if faster than that? That means if a police officer makes you follow their finger faster than 30deg/sec then inherently it is an inaccurate test. Now I’ve never tried to use that in court and I’m not an attorney but just that simple test alone is likely done wrong most of the time. The more you know…

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It’s supposed to take at least two seconds to go from center to maximum deviation. It’s actually one of the easier issues to object to, because it’s so obvious. The more difficult ones are the height of the stimulus (it’s supposed be slightly above eye level, and it’s almost always way too high), contrast of stimulus, backlighting, etc. Then you have “impossible to object to” which is the actual presence or absence of smooth tracking or nystagmus.