It remains to be said that the organs described by Darwin as "primitive" eyes actually possess a complex and irreducible structure that can never be explained by chance. Even in its simplest form, for seeing to happen, some of a creature's cells need to become light-sensitive-that is, they need to possess the ability to transduce this sensitivity to light into electrical signals; a nerve network from these cells to the brain needs to emerge; and a visual center in the brain to evaluate the information has to be formed. It is senseless to propose that all of these things came about by chance, at the same time, and in the same living thing. In his book Evrim Kurami ve Bagnazlik (The Theory of Evolution and Bigotry), which he wrote to defend the theory of evolution, the evolutionist writer Cemal Yildirim admits this fact in this way:

A large number of mechanisms need to work together for sight: As well as the eye and the mechanisms inside it, we can mention the links between special centers in the brain and the eye. How did this complex system-creation come about? According to biologists, the first step in the emergence of the eye during the evolutionary process was taken with the appearance of a small, light-sensitive area on the skin of some primitive living things. But what advantage could such a minute development on its own confer on a living thing in natural selection? As well as this, there needs to be a visual center formed in the brain and a nerve system linked to it. As long as these rather complicated mechanisms are not linked to one another, then we cannot expect what we call "sight" to emerge. Darwin believed that variations emerged by chance. If that were the case, would not the appearance of all the many variations that sight requires in various places in the organism at the same time and their working together turn into a mystical puzzle?… However, a number of complementary changes working together in harmony and cooperation are needed for sight… Some molluscs' eyes have retina, cornea, and a lens of cellulose tissue just like ours. Now, how can we explain the evolutionary processes of these two very different types requiring a string of chance events just by natural selection? It is a matter for debate whether Darwinists have been able to provide a satisfactory answer to this question…352

This problem is so great from the evolutionist point of view that the closer we look at the details, the worse the quandary the theory finds itself in. One important "detail" which needs to be looked at is the claim about "the cell which came to be sensitive to light." Darwinists gloss this over by saying, "Sight may have started by a single cell becoming sensitive to light." But what kind of design is such a structure supposed to have had?

352 Cemal Yildirim, Evrim Kurami ve Bagnazlik (Theory of Evolution and Bigotry), Bilgi Publications, January 1989, pp. 58-59. (emphasis added)