Blood alcohol levels much lower than the legal limit impair hand-eye coordination and could impact high-risk activities that rely on keen visual and visuomotor control such as driving, piloting, or working heavy machinery.
Resources
https://www.eurekalert.org/pub_releases/2020-12/tps-bal122120.php
https://physoc.onlinelibrary.wiley.com/doi/10.1113/JP280395