An emergency supplementary vision device (R) comprises a collapsible tube (2) made of airtight material and having an expanded form and a compact stowed form; first and second clear member (4)s disposed at respective first and second ends of the tube to enable the user to see through the tube and observe a source of information at the other end while smoke or other particulate matter is in the environment; and a filter (8) operably associated with the tube (2) to filter the ambient atmosphere and fill the interior of said tube with clear air when the tube (2) is expanded to its expanded form.