The article is only making the point that the retina is masterfully designed. It has to be backwards to increase energy delivery efficiency, and then these corrective measures are added.-Here Cornelius Hunter, an avowed theist, describes how the retina goes from one photon to electric currents, via a force field. you may not agree with his point of view, but his sceintific description is excellent.-http://darwins-god.blogspot.com/2011/06/vision-cascade-is-initiated-not-by.html