The Collaborative International Dictionary of English v.0.48:

Snow-blind \Snow"-blind`\, a.
   Affected with blindness by the brilliancy of snow. --
   Snow"-blind`ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

snowblindness
    n 1: temporary blindness caused by exposure to sunlight
         reflected from snow or ice [syn: snowblindness, snow-
         blindness]