I agree with what was said earlier, that it is not the physical eyes themselves that we carry from life to life, but in them we can see the wisdom, pain, emotions of our soul. The lessons learned from lives gone by stay with us, reflected in our eyes.
But its not just past lives, intentions, mottives and emotions of the present are there too. If you look for long enough, its like an information overload...

And when you look at some people, well, isnt it just a little bit creepy?

As the doctor says "the eyes are not the windows of the soul, they are the doors. beware what may enter there"