Refers to the thought process behind an artist's creation. Every great idea starts with a pen, paper and a vision - regardless of what you drew, wrote or how long it took to write a work of art, at the end of the day, what's left on that paper is the pen's eye view.
Ken spent all day writing the lyrics to his new song. After ten hours of rewriting and correcting his work, the words on the page is what he has to show. The words are his passion and his creativity on paper. Those words are the pen's eye view.