To be medically fit to drive, a driver must have a field vision of at least what degree?

Answer: B — 70*

A driver must have a field vision of at least 70 degrees to be considered medically fit to drive. This requirement is crucial because peripheral vision is essential for safe driving, as it enables drivers to be aware of their surroundings, including other vehicles, pedestrians, and road conditions. A field of vision of 70 degrees ensures that a driver can detect objects and movements to the side, which is vital for making safe maneuvers, such as changing lanes or turning at intersections. The options represent varying degrees of peripheral vision, with 70 degrees being the minimum standard. A narrower field of vision would not provide sufficient awareness, potentially increasing the risk of accidents.