Not all of us are eagle-eyed and thus it is even more important to take our time to observe and evaluate the water. It is also important to not make a rash decision on fishing the first carp we see. Too many times has an angler cast a gift to the first carp encountered and in doing so blown the whole community that was basically at the feet of the angler.
In North Carolina guide Ken Hardwick with Davidson River Outfitters is as eagle-eyed as anyone that I've encountered while fishing. Ken's ability could be God-given or he has simply trained himself over the years and knows what to look for within the riffles, seams, or in the pockets.
Admittedly I have had to force myself to slow down, take time, carefully peruse every square foot of water before placing the fly in the drink. In doing so, more carp have come to hand.