Therefore, it could be said that whether the figure had normal eyes or heaven-and-earth eyes wasn't due to the difference in the times but instead depended on the client's intention, aims and so on.
相が平常眼か天地眼かは単に時代の変遷によるものとは限らず、依頼主・発願主の意向や目的等によって彫り分けていた可能性がある。