When individuals face OVI (Operating a Vehicle while Impaired) charges in Ohio, they may encounter various physical and mental evaluations administered by law enforcement officers. While certain tests like the Horizontal Gaze Nystagmus (HGN), Walk and Turn, and One Leg Stand have achieved "standardized" status through the National Highway Traffic Safety Administration (NHTSA) and undergone some validation research, officers frequently employ additional tests that lack this crucial recognition. The Lack of Convergence (LOC) test represents another questionable evaluation tool that creates significant vulnerabilities in the prosecution's case.