Source : Webster's Revised Unabridged Dictionary (1913)

Blear \Blear\, v. t. [imp. & p. p. {Bleared}; p. pr. & vb. n.
   {Blearing}.] [OE. bleren; cf. Dan. plire to blink, Sw. plira
   to twinkle, wink, LG. plieren; perh. from the same root as E.
   blink. See {Blink}, and cf. {Blur}.]
   To make somewhat sore or watery, as the eyes; to dim, or
   blur, as the sight. Figuratively: To obscure (mental or moral
   perception); to blind; to hoodwink.

         That tickling rheums Should ever tease the lungs and
         blear the sight.                         --Cowper.

   {To blear the eye of}, to deceive; to impose upon. [Obs.]
      --Chaucer.

Bleared \Bleared\, a.
   Dimmed, as by a watery humor; affected with rheum. --
   {Blear"ed*ness}, n.

         Dardanian wives, With bleared visages, come forth to
         view The issue of the exploit.           --Shak.