Just a little more food for thought.
My mom slowly lost her eyesight but was very good at hiding it. It was several years after the fact that I learned she had had three accidents within her last few months of driving, and that in one of them she had my young daughters as passengers! They weren’t hurt, and she convinced them not to tell Mommy or Daddy about the incident.
It still terrifies me to think what might have happened. Would you be so lucky, and would you be willing to take that chance by letting your parent continue to drive?