Final answer:
Corrective lenses prohibited by the FMCSA include contact lenses and glasses with more than a -20.00 diopter prescription. It's important for commercial drivers to wear approved corrective lenses while operating a vehicle.
Step-by-step explanation:
Corrective lenses that are prohibited by the FMCSA include contact lenses and glasses with more than a -20.00 diopter prescription. These are not allowed because they can impair vision and increase the risk of accidents while driving.
It's important to note that the FMCSA (Federal Motor Carrier Safety Administration) regulates commercial drivers and their ability to safely operate vehicles. The restrictions on corrective lenses are in place to ensure the safety of both the driver and others on the road.
If a driver requires corrective lenses, they must wear them while operating a commercial vehicle and make sure they meet the FMCSA's guidelines.