Is depth perception the reason why our brains get fooled by optical illusions?

Answer 1

Not in all cases. There are many ways to trick the brain's visual processors. The brain isn't just a photographic plate -- it also interprets images. That's how a clever image can trick the brain into making erroneous judgments about an image. For example, the brain might see two identical lines as different sizes depending on their context.

Answer 2

In this realm, all we have are our ideas (thoughts) and those get transformed into words and/or concepts. We must conceptualize before we can realize... right? The very raw truth here is that nobody knows the truth for sure. All we can go on is what we feel and what we experience. In my opinion, earth is a school, nothing more. When we try to attribute too much meaning to this realm, we fall short for the simple reason that our purpose for being here is so much more simplistic than most can dare to imagine. As for our concepts being illusions, the illusion is that we are separate from the force which created us... Namaste my friend. :-)

Answer 3

For those illusions that depend on depth perception, yes. Others depend on other cues, like drawing a circle through several lines. The lines appear to "open" inside the circle.