If your eyes are healthy, you should be able to comfortably see objects which are many kilometers away and to immediately shift your gaze to read a book of small print lying on your knee. You should be able to do this instantaneously with no conscious feeling of your eyes having changed focus.
Did you just roll your eyes and think 'Here we go again'? Bet you must be fed up with listening to your favorite source of entertainment being tagged 'idiot box' and the like.