Which of the following conditions can prohibit the issuance of a chauffeur's license?

High blood pressure can be a condition that prohibits the issuance of a chauffeur's license because it often indicates a higher risk for cardiovascular issues, which can impair a driver's ability to operate a vehicle safely. Licensing authorities typically assess the individual's overall health status and medical conditions that could lead to sudden incapacitation or decreased driving capability.

Specific medical conditions like high blood pressure may require documentation from a healthcare provider to ensure that the condition is managed properly. If it is found to be severe or uncontrolled, it could lead to restrictions or denial of a chauffeur's license to prevent potential risks on the road.

While other conditions such as asthma, diabetes, and vision impairment can also affect driving ability, they may not automatically disqualify someone from obtaining a chauffeur's license as long as they are managed effectively. Asthma can often be controlled with medication, diabetes can be managed through treatment plans, and vision impairments can sometimes be corrected with glasses or contacts, leading to an ability to drive safely. Therefore, high blood pressure is particularly scrutinized due to its associated health risks.