This is a good reference of visual function for those interested in going one step further than the very basics of vision. There are a few inaccuracies, only of concern to those specialised in the field but this is certainly not a textbook on physiology or anatomy and does not claim to be; besides, scientific developments since the last reprint of the fifth edition in 2005 have displaced this document into the realm of historical contributions. As an ophthalmologist and digital designer, I can appreciate the fascinating psychological, philosophical and historical approach, so important for understanding the potential of visual media productions. I am sure it will feed creative minds and "open the eyes" of many, working in visual arts.