I wonder if that afforded some level of protection to the surface dwellers’ receptors when in direct contact with high levels of sunlight.
YOU HAVE NO POWER HERE
Submitted 1 day ago by fossilesque@mander.xyz to science_memes@mander.xyz
https://mander.xyz/pictrs/image/217bc085-d052-46bf-87d9-ce172d6e4b81.jpeg
Comments
rumba@lemmy.zip 9 hours ago
IndustryStandard@lemmy.world 3 hours ago
As usual with biologists, if they don’t understand what it does they claim it’s a useless byproduct of evolution. A few years later they discover there is actual purpose to it and it’s actually pretty nifty. Rinse and repeat.
ArmchairAce1944@discuss.online 7 hours ago
I am biology illiterate. Explanation please.
CaptainBlagbird@lemmy.world 6 hours ago
Octopuses don’t have a dead spot in the eyes I guess
fossilesque@mander.xyz 6 hours ago
Scallops, oysters, mussels and clams have anywhere between 40 and 200 eyes. en.wikipedia.org/wiki/Mollusc_eye
canihasaccount@lemmy.world 21 hours ago
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:
bigpEE@lemmy.world 16 hours ago
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
Bishma@discuss.tchncs.de 5 hours ago
This is the meme that set off Cylon Number One (aka John Cavil) and eventually lead to the attack on the 12 colonies.
diverging@piefed.social 1 day ago
Because of this we have blind spots, one for each eye. They are not usually noticeable because 1) the blind spot of one eye can be seen by the other, and 2) the brain fills in the gap.
So with this I will perform a magic trick, I will make your thumb disappear: Close your left eye and with your right look at a spot in the background, make a thumbs up gesture and place the tip of your thumb on that spot, move your thumb to the the right continuing to look at the spot in the background, when your thumb moves about 15 cm your thumb should disappear.
You can use you left eye too, just switch the directions.
Carrot@lemmy.today 7 hours ago
Woah, i didn’t know that the effect would be so drastic. I want to point out to those struggling to get it to work that, as diverging mentioned, your arm needs to be fully extended. Also, the blind spot is about a thumb’s width, at least for me, and is only visible at a specific x/y axis location. Any deviation from that single spot will cause it to stop working. I could tell I was close to the spot when parts of my thumb would disappear, and just had to slowly move it around until I found the spot that looked like the thumb was gone completely.
0ops@piefed.zip 4 hours ago
Thanks you helped me see it (or not see it I guess)
InvalidName2@lemmy.zip 1 day ago
It’s way too late at night for all those directions, somehow ended up creating my own blind spot by sticking my thumb in my bum.
diverging@piefed.social 1 day ago
Well, I guess your thumb disappeared.
I can try another way the blind spot is about 15 cm at arms length to the right of the right eyes center of vision. So put your thumb there and it should disappear
tacosanonymous@mander.xyz 22 hours ago
At least your dick didn’t get stuck in the toaster.
callyral@pawb.social 7 hours ago
It looks like there’s just a gap in spacetime or something.
By the way, your eyes are not meant to track your thumb when doing this, you have to keep still and move only your thumb for it to work, so don’t move your eyes.
drmoose@lemmy.world 21 hours ago
the brain fills in the gap
To expand on this, current leading theory (predictive processing) says that brain first generates a visual image than confirms it with inputs and if there’s no input to confirm/deny the halucination it’s just accepted as is. So we can have a whole load of blind spots in all of our sensors and continue functioning rather well with an ocassional artifact.
Whats_your_reasoning@lemmy.world 13 hours ago
I think about this at night when my eyes are forced to attempt to make sense of the low light levels in a dark room. I know my room isn’t grainy and grey-scale - that’s just the best my eyes and brain can do at night. It’s interesting to look around and try to imagine the proper colors and shapes of things, reckoning the difference between what I know and what I see in the moment.
With our brains constantly making things up to explain gaps in information, it’s no wonder kids think they see “monsters” in the dark. It’s also no wonder that nightlights work well to keep said “monsters” away.
BuboScandiacus@mander.xyz 10 hours ago
AI witchhunting crowd hates this one simple trick !
Eq0@literature.cafe 10 hours ago
Succeeded, thanks! That’s uncanny!
Modern_medicine_isnt@lemmy.world 22 hours ago
I couldn’t make it work. But I did notice that the spot in the background changed focus a tiny bit at one point. I suspect my brain was tracking the thumb and simply refused to continue to truely focus on the background spot. I tried and tried, but just couldn’t make it happen. Neither eye. :(
Catoblepas@piefed.blahaj.zone 21 hours ago
Make sure to hold it at arm’s length, if you weren’t already. If it’s close to you it’s too big to vanish into the blind spot.
clot27@lemmy.zip 22 hours ago
What is a “spot in the background”? Like where exactly
Todd_cross@lemmy.dbzer0.com 21 hours ago
Anywhere. It makes it easier, if you have a dot or a feature to look at, but really it’s anywhere in the distance.
Tollana1234567@lemmy.today 17 hours ago
convergently evolved eyes, cephalod pod eyes evolved very differently from tetrapods. cephalpod eyes evolved by forming an invagination of those tissues. whereas the tetrapods evolved as extensions of thier brain.
socsa@piefed.social 5 hours ago
Having a larger focal point farther back from the aperture should also reduce parallax, I crease field of view and improve depth perception.
betanumerus@lemmy.ca 10 hours ago
If vertebrae don’t have it, it means they don’t need it.
jsomae@lemmy.ml 7 hours ago
that’s not how evolution works.
lazyViking@lemmy.world 6 hours ago
Not really. Needs is a fairly strict word. If it was needed they would not survive without. Useful, i agree with you
tetris11@lemmy.ml 6 hours ago
Dont they eventually produce global maxima by iterating towards it through the many degrees of freedom allowed by crazy mutations and time?
Tiger666@lemmy.ca 5 hours ago
No, you are 100% wrong.
pyre@lemmy.world 5 hours ago
no they’re not. by definition if you don’t have what you need you don’t survive. we definitively don’t need it. or at least haven’t for millions of years. that’s different from saying we wouldn’t benefit from it.
although that’s not a guarantee either. more information isn’t always better.
Thedogdrinkscoffee@lemmy.ca 1 day ago
More mindflayer propaganda.
luciole@beehaw.org 11 hours ago
ph’nglui mglw’nafh Cthulhu R’lyeh wgah’nagl fhtagn and so on
gedaliyah@lemmy.world 1 day ago
✅ Discount number of limbs
✅ Cheaply made eyeballs
✅ Held together with a bunch of inflexible bones
Wait, am I just an off-band octopus?
Damn.
Goun@lemmy.ml 19 hours ago
- just one brain
Rachelhazideas@lemmy.world 15 hours ago
Quick way to find your blindspot:
- Close your right eye
- Hold your phone/monitor 1ft (30cm) away from your face
- Look at the ‘x’ below
- Slowly bring your phone towards you (or your face towards the monitor) until the ‘.’ disappears
. x
jsomae@lemmy.ml 7 hours ago
The
.
is not visible to me at any distance.BuboScandiacus@mander.xyz 10 hours ago
faythofdragons@slrpnk.net 9 hours ago
Your username says you’re an owl, but you’re suspiciously squid shaped
TheTechnician27@lemmy.world 1 day ago
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.)
someguy3@lemmy.world 1 day ago
MonkderVierte@lemmy.zip 9 hours ago
Not sure if all but at least 7. and 8. are extinct.
Whats_your_reasoning@lemmy.world 13 hours ago
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.
SubArcticTundra@lemmy.ml 1 day ago
Do I understand correctly that our ancestors had left the water before this upgrade dropped for fish?
diverging@piefed.social 1 day ago
I don't think you understand correctly. The cephalopod eye and the fish eye (which includes tetrapods) evolved independently.
NounsAndWords@lemmy.world 1 day ago
I’ve said it for years, as soon as it’s commercially available I’m getting photoreceptors realignment surgery.
errer@lemmy.world 1 day ago
Is this something we could like, fix?
MonkderVierte@lemmy.zip 7 hours ago
Why? Is it broken?
Kalothar@lemmy.ca 1 day ago
Uhhhh gonna say we could theoretically, but I imagine the brain has evolved a bunch of other subfuntions to make this work.
Though I bet you’d adjust super fast if it were only a visual change since our brains are great at adapting
WolfLink@sh.itjust.works 21 hours ago
Cephalopod eye transplant!
I wouldn’t be surprised if the brain could figure out how to use a cephalopod style eye, especially if it was given young.
someguy3@lemmy.world 1 day ago
Geordi eyes.
DrFistington@lemmy.world 23 hours ago
Predator vision… Which I think is the same thing
Typhoon@lemmy.ca 1 day ago
This is one of many reasons the perfect eye argument by creationists is utter bullshit.
themeatbridge@lemmy.world 1 day ago
Ugh that drives me crazy. The human eye is a perfect example of observable evolution. Organisms exist with every stage of eye development, from a photosensitive spot to a more advanced convergent evolution of our eye. And the human eye is poorly designed for it’s current use, resulting in a significant percentage of people requiring corrective lenses.
floofloof@lemmy.ca 1 day ago
It’s a good example of evolving towards a local maximum then being unable to travel through a valley to a more optimal design. As such it confirms exactly what evolutionary theory would predict, and not what “intelligent design by an omniscient creator” would predict.
Quill7513@slrpnk.net 1 day ago
most of the dipshit “the eye is to perfect to have evolved” people also have cheap optics on their rifles. something to think about
Catoblepas@piefed.blahaj.zone 1 day ago
Clearly this means God’s chosen are the cephalopods.
pennomi@lemmy.world 1 day ago
🧑🚀🔫🐙 Always have been.
deus@lemmy.world 1 day ago
In the lore of Lord of the Rings, it is said that the supreme being of that universe personally created both men and elves and since men were his favorite creations, he gave them the gift of… having pretty short lives (wow, thanks). Well, octopuses have a much shorter lifespan than us, so if our universe’s creator is anything like the Middle Earth’s then there’s a good chance they are his favorites.
TomArrr@lemmy.world 18 hours ago
As someone with chronic back pain, eyes are the least of my issues with creationists theories
tetris11@lemmy.ml 6 hours ago
exactly, bananas - amirite?
dave@feddit.uk 18 hours ago
Yeah, my eyes are so perfect, I read that as ‘cartoonists’ and spent a good few minutes confused.