What is the required vision standard for a commercial driver according to DOT regulations?

The required vision standard for a commercial driver according to DOT regulations is a minimum of 20/40 vision in each eye, with or without correction. This standard is in place to ensure that commercial drivers have adequate visual acuity to operate vehicles safely. Having 20/40 vision allows drivers to clearly see and interpret signs, other vehicles, and obstacles, which is critical for safe driving in various conditions.

Meeting this vision standard helps to minimize the risk of accidents caused by poor visibility. The allowance for correction means that individuals who may not meet this standard naturally can still qualify as drivers if they use glasses or contact lenses, ensuring broader access while maintaining safety.

In contrast, the other options either specify vision requirements that are higher than necessary or do not meet the regulations. For example, requiring 20/20 vision in each eye is more stringent than what is stipulated, and while having 20/50 vision could still be adequate with correction, it does not satisfy the basic requirement for commercial driving. Similarly, the standard of 20/30 vision in at least one eye does not ensure that dual vision standards are met, which is important for depth perception and overall driving safety.