What medical condition can disqualify a driver from certification if untreated?

Uncontrolled diabetes is a condition that can significantly impact a driver's ability to operate a vehicle safely. High blood sugar levels can lead to a range of complications, including impaired vision, increased risk of hypoglycemia (low blood sugar), and potential loss of consciousness. These effects can pose serious risks not only to the driver but also to other road users.

For medical certification, it is essential that a driver’s diabetes is well-managed, indicating that they have regular monitoring, appropriate treatment, and an understanding of how to manage their condition. If left untreated or uncontrolled, the risks associated with diabetes can make an individual ineligible for certification, as public safety is the top priority.

Other conditions listed, such as high blood pressure or untreated anxiety, while they may also impact a person's ability to drive, do not typically pose the same immediate and acute risks as uncontrolled diabetes regarding sudden incapacitation or loss of control while driving.