LOUISVILLE, Ky. (WDRB) — A bill signed into law three years ago that requires drivers to undergo a vision test before renewing their license takes effect Jan. 1. The goal is to keep drivers with poor vision off the roads by making sure all licensed drivers “maintain good vision,” according to a news release Thursday from the state. Several nearby states, including Indiana, Ohio and Missouri, require screenings to ensure drivers can see well enough to get behind the wheel.