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Controlled diabetes is not inherently a disqualifying condition for a commercial driver. Many individuals with diabetes can maintain their health and safely operate a commercial vehicle, provided their condition is well-managed and does not impair their ability to drive. The Federal Motor Carrier Safety Administration (FMCSA) has specific guidelines for drivers with diabetes that allow them to continue driving if they meet certain criteria, such as having no episodes of hypoglycemia that could lead to a loss of consciousness.

In contrast, conditions like alcoholism, missing limbs, and severe vision impairment can significantly impact a driver’s ability to operate a vehicle safely. Alcoholism, especially if untreated, poses a high risk for impaired judgment and reaction times. Missing limbs can affect a driver's ability to control the vehicle effectively, depending on how well the individual adapts and whether they use prosthetics or adaptive driving equipment. Severe vision impairment hinders a driver's ability to see and react to road conditions, signals, and other vehicles, which is crucial for safe driving.

For these reasons, controlled diabetes, when managed properly, does not automatically disqualify a person from obtaining a commercial driver's license.