□ □ □
[□] □ □
□ □ □ □
But in case after case , Gazzaniga 's laboratory was unable to demonstrate such a transfer , suggesting that " visual imagery , as it exists in humans , is not a property of the actual visual system , but is a computation taking place somewhere else , and remains disconnected from the processes of the other hemisphere " ( p. 93 ) . Brain damage is usually stable and an impaired visual system is capable of improving many functions . These analyses are related to the mechanism by which the corpus callosum has a critical role in the development and / or maintenance of a normal visual system . The catalog should move from simple to profound examples of irreducible complexity ( such as the mammalian visual system ) .