He pretended to agree that to suggest it could have been formed by natural selection seemed ‘absurd in the highest possible degree’, but the following sentences reveal what he was really thinking. Darwin goes on to maintain that natural selection could easily have brought about vision by a series of almost imperceptible changes working without a design specification and his modern-day disciples now claim that the evolution of the eye presents no difficulty to them. When this claim is examined, it proves to be a good example of how a faulty belief system can blind one to the evidence and a very good illustration of the adage ‘there are none so blind as those who won’t see’.