Sculpture

Ok mostly I make pottery, but sometimes I get inspired to try sculpture. I
especially like using paperclay. I find it very difficult to sculpt eyes
though. Having them closed is fine, but open is very difficult for me. I
have done one just now with a young woman in a strapless gown, standing on
the hem and of course the predictable problem, I have managed the mouth with
an O - oops expression, but having the eyes closed made it look like it was
on purpose and she was being provocative. I have opened the eyes and it is
ok but it was a struggle I must have done them a dozen times and they could
still be better. Does anyone else do sculpture and have a secret to making
good eyes?