In our phenomenal experience, different features of an object, like shape and color, seem to be bound together into a single percept, even though those features are represented in different parts of the brain. Explaining this phenomenon is known as the binding problem. If I look at a red apple, the internal representations of its red-ness and its apple shape are bound together. But what if I am not looking at the red apple -- what if my visual attention is not on the red apple? In that case, are the object's redness and appleness still bound together? Or does binding require attentional focus? Does it require consciousness? 
Are representations of unattended objects bound?
vision;attention