From: mark.e.emerson@gmail.com   
      
   Put simply, by focusing on the object and not on the mirror.   
      
   If you focused your eye on the mirror you'd see the image of the mirror and   
   not the object. By focusing at object distance you'd see the object and not   
   the mirror.   
      
   You can observe this with any mirror or the screen on your phone. Find a   
   reflection of the lights above you with your eye. Now force your eye to focus   
   on the screen. You'll still see the lights but only the screen will really be   
   in focus.   
      
   Your eye is reshaping your lens and changing the focal length to adjust the   
   object distance that's in focus at the retina.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)