What is the term for an area not visible to the driver when looking in the mirrors?

The correct term for an area not visible to the driver when looking in the mirrors is "blind spot." This refers to the regions around a vehicle that cannot be seen directly through the vehicle's mirrors, making it crucial for drivers to check these areas visually by turning their heads or using additional methods, like checking for blind spot detection systems if the vehicle is equipped. Blind spots typically exist on both sides of the vehicle, and understanding their locations is vital for safe driving, especially when changing lanes or merging.

The other terms, while they may seem appropriate, do not accurately describe the concept of an area not seen in the mirrors. "Dead zone" could be confused with other unrelated concepts in driving, and "vision gap" and "reversed view" are not terms commonly recognized in relation to driving safety and awareness. Therefore, "blind spot" is the correct and widely accepted term within the context of driving discussions about vehicle safety and awareness.