Technically, a visa issued by a U.S. Embassy or Consulate only entitles the holder to apply for admission to the United States. An immigration inspector at the port of entry will determine the visa holder's eligibility and how long he or she may stay. The vast majority of visa holders are admitted without a problem, but to avoid inconvenience (and possible denial of entry) it is essential that visa applicants ensure they have the proper type of visa and be truthful about their intentions when applying for the visa.