If it worked 99% of the time, compliance would be nil, but you don't want these drivers to be affected 1% of their commute

Even if a person would be compliant, if they wore this most of the time, they wouldn't be accustomed to the varifocal lenses while driving, guaranteeing that whatever other solution than these autofocusing lenses they select for driving, they won't be adapted to them whenever they drive.