One experiment young Isaac Newton tried boggles the mind. To understand light and optics better, Newton inserted a long needle "between my eye and the bone, as near to the backside of my eye as I could." Why take such a risk? Lucas Hnath’s brilliant new play, Isaac’s Eye, reimagines the contentious, plague-ravaged world Newton inhabited as it explores the dreams and longings that drove the rural farm boy to become one of the greatest thinkers in modern science.