You can't get a drivers license if your vision falls below 20/40. That's a "slight hint of incapacitation".
Edit to clarify: ...without also requiring eye correction. Of course you can wear glasses to drive, but it becomes mandatory, and without that eye correction you cannot get a license.
Edit to clarify: ...without also requiring eye correction. Of course you can wear glasses to drive, but it becomes mandatory, and without that eye correction you cannot get a license.