I certainly haven't seen all there is to see and since YOU are the one to ask the question,
I don't think you'll find 'eyes' per se, that you would equate with what you see in BEM.
I think the presence of eyes in either BEM or Coco are the result of two different phenomena.
I have seen many Rosewood burls (Coco being a Rosewood) but I think that what we would consider an 'eye',
is more the result of the gnarly omnidirectional grain of the wood wrapping around itself to form a center.
Whereas in BEM, it doesn't need the burl to form an eye.
Not making any claims, just throwing around some thoughts. Maybe an informative discussion will ensue.
KJ