Enhancing the Cone Photoreceptor Sensitivityhere, here, here, here and here for example, has repeatedly been rebuked. As we learn more we find the retina has all kinds of subtle and clever designs. And now new research out of Israel continues to confirm this trend. Unbelievably, the scientists have demonstrated that the retina’s Müller cells are wavelength-dependent wave-guides that focus the longer-wavelength green-red light onto the cone photoreceptors and pass the shorter-wavelength blue-purple light through to the rod photoreceptors.
It just so happens that is a great idea because while the cone photoreceptors are fast acting and provide color vision, they are less sensitive and need all the help they can get. The rod photoreceptors, on the other hand, are mainly sensitive to the shorter-wavelength blue-purple light, so they don’t miss too much the filtering out of the green-red light. As one science writer concluded:
Having the photoreceptors at the back of the retina is not a design constraint, it is a design feature. The idea that the vertebrate eye, like a traditional front-illuminated camera, might have been improved somehow if it had only been able to orient its wiring behind the photoreceptor layer, like a cephalopod, is folly.
It just isn’t very smart to criticize a design when you’ve never built one yourself and, much less, don’t even know how it works. It’s even worse to then use that ill-conceived criticism as justification for the claim that the design arose spontaneously. From a scientific perspective that claim was always weak. Now it is simply ridiculous. The retina’s incredible design reveals the details of what always was intuitively obvious. As Paul explained, God has made foolish the wisdom of this world.