{{
`${userDetail.user.displayName}${userDetail.user.cachedBungieGlobalDisplayNameCode ? `#${standardizeBungieGlobalCode(userDetail.user.cachedBungieGlobalDisplayNameCode)}` : ""}`}}
{{getUserClans()}}
1/29/2013 6:52:20 AM
4
Then how do we see things moving in our periphery without turning to see it? That alone totally debunks your idea of brains guessing what's there.
English
-
Edited by xlegitxprox420x: 1/29/2013 8:00:35 AMThat's the human eye, the entire interior is filled with retina that can detect movement and changes in light level, but can't accurately percieve shapes or differentiate between still objects. See the tiny little dot labeled the macula? That 1.5 mm wide dot is where the eye can detect acute shapes and color and form a 'real' image. On top of this, retinal blood vessels and nerve tisse connecting to the ocular nerve create large blind spots in the region between the focus and peripheral regions of the field of vision. In other words, peripheral vision does extend beyond normal visual perception, but doesn't detect anything but movement and is full of holes. The brain still has to do fill-ins for shapes.
-
But I can see the green dot on my printer in my periphery without looking at it. The center of my vision is on the computer screen but I can shift my focus still to the dot of green light still in my periphery while my center of vision is in the center of my screen. Likewise, when I stare at a point 8 feet to the left of my television, I can still, in my periphery, see the colors on it change. That isn't movement, it's a change in color. How do you explain that?
-
Wierd, your question has caused be to start messing around with a few lights on my own. Personally can't percieve color in my peripherals... I have a charger with a light that can flash between green and red, and i can tell when they change due to the sudden change in the light level (since the red is darker) but i cant actually tell which color it is without glancing at it (well, i get the vague sense of the color, since that is what the retinas cones can detect, though not nearly as well as the receptors of the macula).
-
A fun personal experiment is to do what I said after that: look at a specific point, and attempt to focus on things in your periphery while keeping your center of vision on that dot. It's easier if you imagine yourself having an actual "mind's eye" which can pan around your vision without changing your field of view. Like looking at different things through the lens of a camera without moving the camera to change the center of your view and better see those things. It's surprising how well you can actually focus on things in your periphery, and it's because of these things I do sometimes (when I'm bored) that I don't buy that you can't focus on things fully and completely in your periphery. You can develop tunnel vision when you focus on one thing because you're not doing that shifting of mental focus in your field of view. Your brain doesn't care about your periphery because YOU don't care about your periphery at that point in time, not because it cannot physically focus on it. That's my pseudo-optometrical theory.
