I was once told that a bass' eye can be an indicator to what he's feeding on, that his eye is a slow adjusting. And that if you catch him and he's looking down then he's feeding on crayfish, etc, if he's looking up he's feeding on topwater and if he looks straight he's feeding on fish.

But I don't believe this, because of all the numbers of videos (underwater) of bass I constantly see their eyes adjusting and looking all around for food. And besides, if he is looking down when you catch him and you caught him on a top water, than how the heck could he see your lure???

Another thing is the Lateral Line, I've read that the lateral line on the side of the bass picks up vibrations, in the Bass Professor's e-book it says that spinner-baits are quiet lures but yet only you feel the vibration through the rod/reel. Doesn't the spinner-bait disperse vibrations in the water which the bass pick up on their lateral line? or is there something more to it?

Just a few things I would like getting straightened out...or known the truth to...anyone else have any opinions?  

as far as the eye thing goes...thats a new one on me.  The only way that I've ever discovered that would let me know that  a bass is keying on this or that is their teeth.

Smooth feeling teeth a.k.a. they aren't cutting up your thumb or feeling like little needles lets me know that the bass are feeding on harder objects such as crawfish.  Really sharp, needly feeling teeth let me know that the bass are feeding on fish or soft bodied creatures.  Of course, that is all a relative point..as old age and various other things can effect the teeth.

As far as spinnerbaits putting out vibrations..yes, they do.  They are a quiet lure in that they aren't gurgling and spitting water but they are thumping "silently"(by that I mean that they are making vibrations in the water, not sound) and the bass can feel/detect that.  Its akin to the thump or vibration a fish would make when swimming rapidly.  

I totally get what Doug meant about spinner baits; his point is that spinner bait does not fight the water like crank bait, chatter bait or others. A spinner baits flows through the water in a smooth motion not all erratic, unless you're slow rolling a large Colorado blade.