“Differential Diagnosis of Dots, Flecks, and Specks of the Fundus,” Howard Schatz, Robert N. Johnson and H. Richard McDonald, Retina, vol. 12, no. 1, 1992, p. 67
(http://dx.doi.org/10.1097/00006982-199212010-00013).
(That’s an excerpt from the article “Dots and Spots Research Review,” published in AIR 14:5.)