How light touches your eyes

[Kaitan]

This YouTube channel has been inactive for the last three years and recently started to upload news videos and made them with a new software. It's popular science focused in biochemistry, it gets quite technical and even as a chemist I get lost easily, but despite that, the content is great and very insightful.

This video is part of a series that explores the role of proteins in our senses. Here is about the eyes and previously he talks about hearing. They are all mind-blowing. 10/10

https://youtu.be/LexKZva0s4I?si=vbfZjPRnKwU4A5MV

Gasshō
stlah, Kaitan

[Meishin]

Thank you, Kaitan. Attached is a link to a wonderful project involving light, art and science.

https://www.pbs.org/newshour/show/art-and-science-collide-in-enormous-project-at-dozens-of-museums-and-galleries

Gassho
Meishin
stlah

[Kaitan]

Thank you, Kaitan. Attached is a link to a wonderful project involving light, art and science.

https://www.pbs.org/newshour/show/art-and-science-collide-in-enormous-project-at-dozens-of-museums-and-galleries

Gassho
Meishin
stlah

Looks like a great initiative, thank you for sharing!

Gasshō

stlah, Kaitan

[Matt Johnson]

This YouTube channel has been inactive for the last three years and recently started to upload news videos and made them with a new software. It's popular science focused in biochemistry, it gets quite technical and even as a chemist I get lost easily, but despite that, the content is great and very insightful.

This video is part of a series that explores the role of proteins in our senses. Here is about the eyes and previously he talks about hearing. They are all mind-blowing. 10/10

https://youtu.be/LexKZva0s4I?si=vbfZjPRnKwU4A5MV

Gasshō
stlah, Kaitan

Very cool Kaitan. I could follow most of this. Its amazing how our eyes work at the molecular level. With all the intricate protein movements, chemical reactions and nerve signaling involved, it seems like these processes would take longer than they do, even though light reaches our eyes instantly.

totally did not know anything about that Wiggly little thing retinal... crazy!

Then there's all the stuff that happens in our brain that makes the experience seamless (temporal integration)

I've always been interested in trying to talk to someone who could explain to me some of the perceptions of vision and relating them to specific Chemical and molecular activity. kind of a mix of the objective and subjective... for example, when you meditate for a long time in a low Light room we see a lot of static which I have found the term for. this is stochastic resonance (i think!?). It's like the backdrop that allows for signals to be picked out. It's kind of like static on a radio and using that noise during signal processing. that must be linked to some of this chaos in the eyeball. for some reason it also reminds me of why grain sizes increases the higher the film speed in an SLR camera.... or maybe even the CCD of a digital camera? You certainly do see a similar effect in low light using a digital camera...

I also understand that "floaters" are changes in the density of the aqueous humor, but it doesn't make sense that I can kind of see them in focus but they are before the lens. how is it I can see them so clearly shouldn't they be out of focus?

another phenomena that I'd like some explanation on are the little cells that seem to go darting around that become very visible when I'm looking at a bright background like the sky or snow.

thanks for that thought-provoking video

_/\_
sat/ah
matt

[Matt Johnson]

Thank you, Kaitan. Attached is a link to a wonderful project involving light, art and science.

https://www.pbs.org/newshour/show/art-and-science-collide-in-enormous-project-at-dozens-of-museums-and-galleries

Gassho
Meishin
stlah

Brilliant! that's so cool! I especially like the one with the grasses on Mars and the kaleidoscope!!!

just watched this interesting use of light

https://youtube.com/shorts/ueLMm1gcY7M?si=68LOugM6FjeGfwqy

_/\_
sat/ah
matt

[Kaitan]

I also understand that "floaters" are changes in the density of the aqueous humor, but it doesn't make sense that I can kind of see them in focus but they are before the lens. how is it I can see them so clearly shouldn't they be out of focus?

They are out of focus because they are too close, like inside the eye. You can't focus an enzyme since it in the range of nanometers, the eye simply don't grasp that.

another phenomena that I'd like some explanation on are the little cells that seem to go darting around that become very visible when I'm looking at a bright background like the sky or snow.

No idea, perhaps those are the same floaters?

Gassho
stlah, Kaitan

[Matt Johnson]

They are out of focus because they are too close, like inside the eye. You can't focus an enzyme since it in the range of nanometers, the eye simply don't grasp that.

No idea, perhaps those are the same floaters?

Gassho
stlah, Kaitan

I understood that kaitan. i should have been more precise. This was related... under the heading "other weird stuff that happens in the eyeball...."

but then to suppose that none of the actions of this pump stuff is observable doesn't make much sense either...

as for the weird Firefly zippy things:

Just look up at the sky sometime you'll see them... they're different than the floaters...

but it doesn't make sense to me how they could be either in focus or out of focus... shouldn't be observable at all because they are before the lens...

and I understand we are talking about very very different sizes here... although these things that are darting around which sometimes you can see when you cough really hard or when you get hit in the head, I think they're commonly what people see when they see "stars"..

_/\_
sat/ah
matt

[ZenJay]

Hi Matt,

I believe you are referring to Blue Field Entropic Phenomenon

Gassho,
Jay

Sat/lah today