A<unk> is a hoop-shaped mobility aid used by some blind and visually impaired people, and was designed to help them navigate their way over rough terrain or in a rural environment. It performs a similar role to a white cane, but is designed for use in conditions where using a white cane can be difficult, for example, in snow or on sand. It can also be used by young children as a pre-cane aid or by people with arthritis and other medical conditions which would make the use of a traditional cane difficult. The<unk> is designed to detect obstructions, much like cat's whiskers, through both tactile and audio feedback. Because the<unk> is moved along the ground rather than being moved from side to side like a cane, the user can also detect drops two paces ahead, narrow gaps or similar potential obstructions on either side of the path ahead. The<unk> was invented in the early 1990s by Clive Ellis and Tony Larkin, two lecturers at the Royal National College for the Blind in Hereford, United Kingdom. The<unk> is made to order with five different sizes available.
Hoople 
Plague doctor
Medicine man
Hives
Soman
Standard person
Ben's Friends
Clinician