Additional note regarding background/foreground: Inbetween my 5 days ago comment on background/foreground, my 13 yr old nephew came to me with a question. He wanted to know why he gets double vision of the background when he’s focusing closely on the foreground and gets double vision of the foreground when he’s focusing on background. I was stumped at first, and asked uvuncular questions to determine if he has easy conscious control of it (to know if it’s medical or just playing around), all the while trying to puzzle out what’ s happening. Then it hit me! I don’t see in 3D. I physically cannot. Born with a right lazy eye that has no central vision, I have “cyclops vision”. It’s a band that goes across like a movie, with “awareness” but not sharpness on my right side. Now I thought stereo vision worked by “popping forward” something when you get close enough to it. But I never considered “foreground / background” (as if a video game / movie / theater) is an aspect of 3D stereoscopic vision. So, I had my answer to give. A guy without 3D vision explaining a hypothetical 3D vision process to a guy with 3D vision. Blind leading the sighted. .(when I get double vision, I do not distinguish foreground / background. it’s all the same).

Additional note regarding background/foreground: Inbetween my 5 days ago comment on background/foreground, my 13 yr old nephew came to me with a question.
 
He wanted to know why he gets double vision of the background when he’s focusing closely on the foreground and gets double vision of the foreground when he’s focusing on background.
 
I was stumped at first, and asked uvuncular questions to determine if he has easy conscious control of it (to know if it’s medical or just playing around), all the while trying to puzzle out what’ s happening.
 
Then it hit me! I don’t see in 3D. I physically cannot. Born with a right lazy eye that has no central vision, I have “cyclops vision”. It’s a band that goes across like a movie, with “awareness” but not sharpness on my right side.
 
Now I thought stereo vision worked by “popping forward” something when you get close enough to it.
 
But I never considered “foreground / background” (as if a video game / movie / theater) is an aspect of 3D stereoscopic vision.
 
So, I had my answer to give. A guy without 3D vision explaining a hypothetical 3D vision process to a guy with 3D vision. Blind leading the sighted.
 
.(when I get double vision, I do not distinguish foreground / background. it’s all the same).
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 (upon further reflection, I think one eye processes nearsighted and the other processes farsighted, causing the swapping double vision effect he experiences, an experience I can hypothosize but never confirm myself)
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  It’s just one wide eye with a defective right field.
(the left field is flawed too but it’s my only good enough eye)
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 Yet, I can IMAGINE being in a picture if I look at it for a minute. It gets deeper to me too but I have to mentally place myself there. It’s a mind-trick for me, not a function of vision.
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 Through my bad eye it looks like black snow over everything. Things are sharp (with glasses only) but it’s a smaller field and dimmer. I cannot read with it as the black snow continually moves.I suppose it’s like looking through a sweater but you can’t focus on anything in particular.
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  It’s not “spots” either. It’s akin to snow falling but suspended in the volume of space in front of you and around you and you’re trying to look through it but you can’t quite be certain of what you’re looking it.Looking at large letters with the bad eye is the worst part. I see them but they never “jump out” as words to me.Words actually *do* jump out of the page when you read.

I know because for one of my eyes, it doesn’t and can’t. It’s disconcerting.

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 Could be worse though. To compare, Irlen syndrome,which seems really awful, causes horrible fx with words. I couldn’t imagine that. And, I’m very grateful to have a good-enough eye as I love reading.https://www.youtube.com/watch?v=FARizLljRkc

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  I wonder if any education programs have attempted to teach multiple bases young, similar to early multiple language learning? Brain’s smart enough to compartmentalize surely.
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