1. 
2. 
[syn: clear-eyed, clear-sighted, perspicacious]
The Collaborative International Dictionary of English v.0.48:
Clear-sighted \Clear"-sight`ed\ (kl[=e]r"s[imac]t`[e^]d), a.
   1. Seeing with clearness; acutely perceptive, discerning; as,
      clear-sighted reason.
   Syn: clear-eyed, perceptive, percipient, perspicacious,
        clear-headed.
        [1913 Webster + WordNet 1.5]
   2. having sharp clear vision.
      [WordNet 1.5]
WordNet (r) 3.0 (2006):
clear-sighted
    adj 1: having sharp clear vision
    2: mentally acute or penetratingly discerning; "too clear-eyed
       not to see what problems would follow"; "chaos could be
       prevented only by clear-sighted leadership"; "much too
       perspicacious to be taken in by so spurious an argument"
       [syn: clear-eyed, clear-sighted, perspicacious]