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[__ Science __ ] Darwin’s Challenge: The Origins of the Eye

Seems like there aren't any stages in the necessary evolution of a complex eye that are impossible. In fact, we see all the transitional stages in various living things now.
 
Seems like there aren't any stages in the necessary evolution of a complex eye that are impossible. In fact, we see all the transitional stages in various living things now.
Yea nothing is impossible, certainly no transitional things like the mantis shrimp eyes, truly one of a kind, how it all works is still be learned about.

Fascinating creation the only one known to have circular polarization vision.
 
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Yea nothing is impossible, certainly no transitional things like the mantis shrimp eyes, truly one of a kind, how it all works is still be learned about.
Mantid shrimp eyes are pretty much arthropod compound eyes. Like other arthropods, they have superficial lenses, rhabdom cells, and so on. They have evolved new photo pigments, but then so have some humans...
Fascinating creation the only one known to have circular polarization vision.
Only one I know of, although some scarab beetles evolved circular polarization for other purposes.
 
Mantid shrimp eyes are pretty much arthropod compound eyes. Like other arthropods, they have superficial lenses, rhabdom cells, and so on. They have evolved new photo pigments, but then so have some humans...

Only one I know of, although some scarab beetles evolved circular polarization for other purposes.
Yes the scarab beetle has it in its shell, the mantis is the only species that can perceive it with their eyes and effects behavior.
 
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Some evolutionists believed it as an alternative to Darwinism, but Luria and Delbruck showed that favorable mutations arrive randomly, not in response to need. The "script" is in creating a universe in which life works like this. Beyond genius. He is perfect and omnipotent, after all.
 
Just learned this: since the human cornea is birefringent, it is entirely possible that you can detect circularly polarized light. You see, when linearly polarized light goes through a quarter-wave filter (transparent birefringent material) it is possible to detect bow-tie shaped figures that are there because of the circular polarization.

Like many animals, humans are sensitive to the polarization of light. We can detect the angle of polarization using an entoptic phenomenon called Haidinger’s brushes, which is mediated by dichroic carotenoids in the macula lutea. While previous studies have characterized the spectral sensitivity of Haidinger’s brushes, other aspects remain unexplored. We developed a novel methodology for presenting gratings in polarization-only contrast at varying degrees of polarization in order to measure the lower limits of human polarized light detection. Participants were, on average, able to perform the task down to a threshold of 56%, with some able to go as low as 23%. This makes humans the most sensitive vertebrate tested to date. Additionally, we quantified a nonlinear relationship between presented and perceived polarization angle when an observer is presented with a rotatable polarized light field. This result confirms a previous theoretical prediction of how uniaxial corneal birefringence impacts the perception of Haidinger’s brushes. The rotational dynamics of Haidinger’s brushes were then used to calculate corneal retardance. We suggest that psychophysical experiments, based upon the perception of polarized light, are amenable to the production of affordable technologies for self-assessment and longitudinal monitoring of visual dysfunctions such as age-related macular degeneration.”


Perceiving polarization with the naked eye: characterization of human polarization sensitivity. Proc. R. Soc. B 282: 20150338 2015
 
Some evolutionists believed it as an alternative to Darwinism, but Luria and Delbruck showed that favorable mutations arrive randomly, not in response to need. The "script" is in creating a universe in which life works like this. Beyond genius. He is perfect and omnipotent, after all.
Well I don't think man was a random event that just happened.
 
Just learned this: since the human cornea is birefringent, it is entirely possible that you can detect circularly polarized light. You see, when linearly polarized light goes through a quarter-wave filter (transparent birefringent material) it is possible to detect bow-tie shaped figures that are there because of the circular polarization.

Like many animals, humans are sensitive to the polarization of light. We can detect the angle of polarization using an entoptic phenomenon called Haidinger’s brushes, which is mediated by dichroic carotenoids in the macula lutea. While previous studies have characterized the spectral sensitivity of Haidinger’s brushes, other aspects remain unexplored. We developed a novel methodology for presenting gratings in polarization-only contrast at varying degrees of polarization in order to measure the lower limits of human polarized light detection. Participants were, on average, able to perform the task down to a threshold of 56%, with some able to go as low as 23%. This makes humans the most sensitive vertebrate tested to date. Additionally, we quantified a nonlinear relationship between presented and perceived polarization angle when an observer is presented with a rotatable polarized light field. This result confirms a previous theoretical prediction of how uniaxial corneal birefringence impacts the perception of Haidinger’s brushes. The rotational dynamics of Haidinger’s brushes were then used to calculate corneal retardance. We suggest that psychophysical experiments, based upon the perception of polarized light, are amenable to the production of affordable technologies for self-assessment and longitudinal monitoring of visual dysfunctions such as age-related macular degeneration.”


Perceiving polarization with the naked eye: characterization of human polarization sensitivity. Proc. R. Soc. B 282: 20150338 2015
There is no other living thing or manmade optics that can come close to the operating eyes of the mantis. They don't look like any animal eyes on the planet completely one of kind.
Humans have 3 colour receptors the mantis has 12 colour receptors. Though they don't use most of them for color but detecting UV light and other things at a very fast rate.
 
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It should be noted how we process imagery .

It's filtered by our brain like hearing .the things the optometrist told me while checking my vision .how the eye focuses and why we need glasses and also that the eyes are part of the brain and the brain adopts to what we view .

Ie I used to get headaches reading electric dial meters and it took days for that to stop as I read 12345 as 54321 but input it as 12345 ,the number on the right affects the ones on the left .
 
It should be noted how we process imagery .

It's filtered by our brain like hearing .the things the optometrist told me while checking my vision .how the eye focuses and why we need glasses and also that the eyes are part of the brain and the brain adopts to what we view .

Ie I used to get headaches reading electric dial meters and it took days for that to stop as I read 12345 as 54321 but input it as 12345 ,the number on the right affects the ones on the left .
Imagery is formed by light reflection off an object. Light spectrum is key to everything we see.

Sometimes the mind can't process what is true like in 3D street art.
 
Imagery is formed by light reflection off an object. Light spectrum is key to everything we see.

Sometimes the mind can't process what is true like in 3D street art.
To a degree.any photographer will know it is never a true unedited image and the image we see must be created by adjusting light ,and shades.
 
There is no other living thing or manmade optics that can come close to the operating eyes of the mantis. They don't look like any animal eyes on the planet completely one of kind.
Actually, the vertebrate eye can form an image, focus on targets from a few centimeters to infinity, and can adjust to a huge range of light conditions. None of which the mantid shrimp can do. Compound eyes can't form an image, don't focus or even track objects.

Basically, it detects movement. And not surprisingly, the extra visual pigments are evolved from those found in other animals, as is the structure of the compound eyes of mantid shrimp, which are much older and evolved in more primitive arthropods.

It's an example of how evolution can rework existing things to new functions.
 
To a degree.any photographer will know it is never a true unedited image and the image we see must be created by adjusting light ,and shades.
It's interesting why the mind can be tricked some what. It happens also looking at the horizon from a flat plain, it appears flat but there's a 8 inch a mile curvature of earth though you see it as a optical allusion. Not sure why the mind can't comprehend it.
 
Actually, the vertebrate eye can form an image, focus on targets from a few centimeters to infinity, and can adjust to a huge range of light conditions. None of which the mantid shrimp can do. Compound eyes can't form an image, don't focus or even track objects.

Basically, it detects movement. And not surprisingly, the extra visual pigments are evolved from those found in other animals, as is the structure of the compound eyes of mantid shrimp, which are much older and evolved in more primitive arthropods.

It's an example of how evolution can rework existing things to new functions.
The eye of the mantis though is bazaar looking and that's just one thing about it.

That one species punches faster than a 22 cal. bullet, creates cavitation bubbles which produces light and the heat in it, is near the temperature of the sun. Why the over dramatic expression of life in some creatures and not others can't be without thought in some shape or form. I don't see things like that appearing because blind science. the mantis shrimp is biological science creation.

Immortal jellyfish is another oddity. If not for a environmental issue or being eaten it can live for ever.

evolution is simply involvement at every stage possibly written out already. stem cells are vast libraries of things imo. what goes on in them, why things turn on or off at what stage and passed on is a mystery but of Intelligent Design in a long drawn out process from light water dirt to man.
 
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I think I've some on him, wasn't he a believer in intelligent design?
Darwin assumed God was the creator when he wrote his book. There was a lot more interest in God as a "designer" then, before we realized how intricately connected useful and vestigial organs are. Darwin did mention that, pointing out that vestigial organs are sometimes useless, but in other cases are evolved to other functions.

You might classify him as an IDer in the sense that Michael Denton is. Denton thinks the "designer" made life to evolve as it has. Which sounds about right.
 
I believe that God intended the trial-and-error process of evolution as it is. It seems remarkably effective, even if it looks haphazard to us.
 
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