These are examples of goggles and spectacles used by mountaineers and polar explorers to protect their eyes from the harsh glare of the sun reflecting off snow and ice. Prolonged exposure to such glare without protection can cause snow-blindnes. The black-tinted goggles in a leather mask (top) date from 1891-1930. The blue glas goggles with metal side-shields (second from top) date from 1920-1950. The leather-framed wire mesh spectacles (second from bottom) date from 1871-1910. The metal-rimmed green glas spectacles with wire mesh protectors (bottom) date from 1851-1910.
© Science Museum / Science & Society Picture Library