In this novel, the eyes of Dr. T.J. Eckleburg, an occulist, are described as blue, with retinas a yard high ... at least in the advertising sign on which he appears, looking over a desolate land, and it is George who seems to connect the ever watching doctors eyes to God, while talking to Myrtle. Identify this novel in which the doctor appears to be watching over the "valley of ashes", which represents the lost American Dream.
The Great Gatsby