Sight

[Engler]

Originally Posted by Ground_Breaker

I'm speaking from what little I remember from Biology, Health Science Technology, Anatomy and Physiology, and Physics, so some of this may not be entirely accurate, but I'll take a stab at it anyway.

Everything we see is a reflection. Light travels from the sun to the earth and is reflected off the surfaces of every object in the world, which is how we see those objects. That much is obvious.

If I told you to open your eyes and you were looking at an apple on top of a stool, you would recognize the stool right-side-up, because your brain has already interpreted the image and translated the information sent to it by your eye.

However, before the information is sent to your brain via the optic nerve, the image has been turned upside-down in your eye. I think that happens at the focal point, just behind the lens. Again, I'm not 100% sure of the actual places everything takes place, but I know the process. That upside-down image is sent to your brain, and your brain flips the image back to right-side-up, and you recognize it. Obviously, this happens (pardon the pun) in the blink of an eye.



I'm not sure what exactly the "mirroring" is that you're talking about, but it's my understanding that if we see an object upside-down, the eyes send a right-side-up version of the image to the brain, which is confusing to the brain, because 99% of everything we see is transmitted to the brain as an upside-down image. Because the information is seemingly backwards, we have a harder time recognizing things that are upside-down. Relambrien is right.

As far as anything being "essentially reversed"... I don't really know. Define "essentially reversed". Are you asking if, in reality, everything is really upside-down?

That was an epic first post.