Source : Webster's Revised Unabridged Dictionary (1913)

Bisson \Bis"son\, a. [OE. bisen, bisne, AS. bisen, prob. for
   b[=i]s?ne; bi by + s?ne clear, akin to se['o]n to see; clear
   when near, hence short-sighted. See {See}.]
   Purblind; blinding. [Obs.] ``Bisson rheum.'' --Shak.