Is there a difference between seeing and knowing?

Title: The Illusion of Understanding: A Lesson in Perception

Basically I have too tell a time I found the difference between seeing and knowing 
Write about a time when you thought you understood something just by looking at it, but later realized there was more to it. Describe what you saw, what you thought at first, and then how your understanding changed.
Explain what made you see things differently. Was it something you learned, or did you realize something on your own?
Talk about how this experience changed the way you see the world. Did it change how you interact with people or how you solve problems?