Source : Webster's Revised Unabridged Dictionary (1913)

Focus \Fo"cus\, v. t. [imp. & p. p. {Focused}; p. pr. & vb. n.
   {Focusing}.]
   To bring to a focus; to focalize; as, to focus a camera. --R.
   Hunt.

Source : WordNet®

focused
     adj 1: of an optical system (e.g. eye or opera glasses) adjusted to
            produce a clear image
     2: being in focus or brought into focus [syn: {focussed}] [ant:
         {unfocused}]
     3: (of light rays) converging on a point; "focused light rays
        can set something afire" [syn: {focussed}]
     4: concentrated on or clustered around a central point or
        purpose [syn: {centered}, {centred}, {centralized}, {centralised}]