A driver of a commercial vehicle that transports more then eight passengers and who is obliged to wear glasses or contact lenses must:

1. Hold an extra pair of the optical instrument, besides the pair he’s wearing.
2. Correct answer: Hold in the vehicle a spare pair of glasses or lenses apart from the pair he’s wearing.
3. Verify before driving the regularity and cleanliness of the optical instrument.
4. Perform a visual acuity test once every six months, according to requirements.

WhyA driver who wears glasses or lenses and carries more than eight passengers keeps a spare pair in the vehicle besides the one they are wearing. Sunglasses do not count.