Physorg on the question of computer vision:

“Reverse engineering a biological visual system—a system with hundreds of millions of processing units—and building an artificial system that works the same way is a daunting task,” says Cox. “It is not enough to simply assemble together a huge amount of computing power. We have to figure out how to put all the parts together so that they can do what our brains can do.”

“While studying the brain has yielded critical information about how the brain is wired, we currently don’t have enough information to build a computer system that works like the brain does,” adds Pinto. “Even if we take all of the clues that we have available from experimental neuroscience, there is still an enormous range of possible models for us to explore.”