The above (picturing a decidedly unorthodox color blindness test) is from a series of whimsical, satirical paintings by artist Jose S. Perez. Collectively titled Perez on Medicine the 29 separate pieces each focus on a different medical specialty. The whole series, which was initially published as a book in 1993, is presented online at The National Library of Medicine site. Each plate includes a written interpretation as well as initial pencil studies. Very nice.