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This arrangement actually optimizes color vision in the daytime and night vision at night. Evolution selected for the correct arrangement for those of us living on land:
https://theconversation.com/look-your-eyes-are-wired-backwards-heres-why-38319
This is just saying that the glial cells help make this less bad than it could be, no? Nothing about why neurons behind receptors would be worse
No, glia support neurons; they do things like redirecting blood flow to more-active-than-usual neurons, mylenate axons, etc. They wouldn’t form a mesh around neurons’ photoreceptors the same way they do neurons’ somas and axons. What the article describes is that glia actually are critical at allowing for color vision during the day and night vision at night, since on land we’d get too much blue light to see color with much fidelity were it not for glia, and a similar filtration process helps us see at night. It’s not that it’s not as bad as it could be, it’s actually that vision is better this way (barring one small blind spot outside of our fovea–which, being outside of the fovea, would have low acuity anyways).
Couldn’t a neurons-behind-eyes human just have fewer blue receptors? Or a brain that attenuates the blue signal?
Blue light is important for night vision, so either of those options would lead to less of an ability to see well after sunset.
✅ Discount number of limbs
✅ Cheaply made eyeballs
✅ Held together with a bunch of inflexible bones
Wait, am I just an off-band octopus?
Damn.
- just one brain
https://en.wikipedia.org/wiki/Cephalopod_eye
(At a glance, this article needs some touching up and hasn’t been meaningfully contributed to in some years.)
Quick way to find your blindspot:
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Close your right eye
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Hold your phone/monitor 1ft (30cm) away from your face
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Look at the ‘x’ below with your left eye
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Slowly bring your phone towards you (or your face towards the monitor) until the ‘.’ disappears
. x
Well
It doesnt
Your username says you’re an owl, but you’re suspiciously squid shaped
I mean they look like a kid to me
God I love Splatoon character design
The
.is not visible to me at any distance without taking my eyes off thexThe ‘.’ never disappears???
Same with me. Are we cephalods?
Ọ̶͍̖͇̔ù̷̡̗̠͚̤̲͆̆͆̈́̒͂̑̇̈͆r̶͔͔̘̣̪̻̽͆͗ ̶̡̢̢̠͈̲̪̜̘͔͇̟͐̒̑̿͐̈́͌̾̌͐̌̂̃̐͜ͅͅt̷̛̻̫̺́̈͂̓̊̔̈́̈́̀į̶̨͔̣̣̫͖̭̀̏͂̈́́̅̀̂̐̚͘͜͝m̴͇̘̼̻͔͍͚̍̏̽͛̋͛̃͠ͅe̶̜͌̾͒͒́̽ ̶̣̙̻̪͓̒͊̍a̵̭͔̝̣̙̠͇͎͈̺͋̈̇̓͐́̆̈́̈́͐̚ͅp̷̪̮̯̗̰̮̣̩̭̎̓̃̓̚̕͜͠ͅp̷̢̡̙͙̯̹̪͚̘͙̯̰̏͜ř̴̦͎̓͐̄̈́̽̔̇̈́̚̕͝͠o̴̢͍̘̹͎̹͝a̷͙̻̹̯̭̲̩̅̀͆͊̂̏̕̕͝c̴̮̎͑͛͝͝h̵̢͙͇̣͒͒̊̀̕̕͜ė̶̛͇̈́̈́̀͊̈́͛͋̊͂͗̀͋̒ş̵̧̛̘͙̬̯̰͎̖͇͚͖͂̅̔͋͋̏̏͘̕͝͝͝ ̷̢͍̺̣͉̬̹̣̲̪̽͒̏̆̄̆̂͗̒͐̃͛̚b̴̪̤͉̯̲̦̒̊̉͆͑̀̌̊̕r̴̢̢̺̬̜̦̘̪̅͌̐̓̎́̈́̋̈́͛̑̒͘ò̶̳̼̯̻͕͖̹̖̔͜͠t̵̛̖̫͓͎͚̙̀̂̀̃͛̎̅̌̆̇̚̚͠͝h̶͓̟̻̫̲͚͂̇̐e̶̩̻̗͎͎̞͇̠͎̦̊͗͝ȑ̷̢͕̣̳̪
Make sure to keep your left eye looking at the ‘x’ the whole time. The ‘.’ should only be in your peripheral vision.
It’s in my peripheral and it never disappears, I had no issue understanding the instructions.
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Lol, at first glance I thought this was a poster for some new movie. All we need to do is change the font of “Cephalopods” to something exciting, and arrange the listed species as if they were actors’ names.
I’ve said it for years, as soon as it’s commercially available I’m getting photoreceptors realignment surgery.
Do I understand correctly that our ancestors had left the water before this upgrade dropped for fish?
Is this something we could like, fix?
Geordi eyes.
Predator vision… Which I think is the same thing
If vertebrae don’t have it, it means they don’t need it.
that’s not how evolution works. Evolution is not able to produce global maxima, only local maxima.
Not really. Needs is a fairly strict word. If it was needed they would not survive without. Useful, i agree with you
