I find this painting interesting. I love the lighting and expressions depicted within this piece. However, I find his lack of a background somewhat amusing considering a background to painting was practically standard for centuries (with the possible exception of portraits). Plus, it seems that his focus is almost more on the surgeon and onlookers than the actual lesson. Why do you think that is? Could it be to show the reations of controversy (as well as excitement) the people of this time presented to material such as this?