Onur Cobanli explains:
What you see when you check a situation or object depends on your prior experience and wisdom, as you match the perception with existing information, thus you cannot see, or you cannot comprehend anything that you have not a knowledge of; you will see of course but it will be superficial such as the form of the object without understanding the function or words of a sentence without understanding the context. It is like seeing a section, shadow or reflection instead of the object itself.