There is an estimated 285 million people across the world that are visually impaired, with a further 246 million classed as partially sighted, and 39 million people registered blind to date (according to The World Health Organization).
The day to day activities that somebody with full vision takes for granted, like driving a car, exploring somewhere new, or just going to their local supermarket take so much more planning for someone who is visionally impaired. In this clip the young lady in this video is heading off on vacation via airplane, and the clip shows how a task so simple to those with full sight like walking through a metal detector take planning and some extra organization.