Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

A Mathematical Model Unlocks the Secrets of Vision
Quanta Magazine ^ | 21 Aug 2019 | Kevin Hartnett

Posted on 08/25/2019 5:04:26 PM PDT by DUMBGRUNT

This is the great mystery of human vision: Vivid pictures of the world appear before our mind’s eye, yet the brain’s visual system receives very little information from the world itself. Much of what we “see” we conjure in our heads.

“A lot of the things you think you see you’re actually making up,” said Lai-Sang Young, a mathematician at New York University. “You don’t actually see them.”

New research suggests mathematics is the key.

The visual cortex has a mind of its own.

“You may think of the brain as taking a photograph of what you see in your visual field,” Young said. “But the brain doesn’t take a picture, the retina does, and the information passed from the retina to the visual cortex is sparse.”

They hope to decipher, for example, why we can perceive the flashes in a blinking traffic light, but we don’t see the frame-by-frame action in a movie

(Excerpt) Read more at quantamagazine.org ...


TOPICS: Chit/Chat; Science
KEYWORDS: 1sizefitsall; healthcare; science; vision; visualcortex
Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-73 next last
To: DUMBGRUNT

The real question is

“Why are the eyes the windows to a person’s soul?”

Is it the bipolar neurons in the eyes allowing a reflection of consciousness outward as photo re emptor information goes inward?


21 posted on 08/25/2019 6:47:31 PM PDT by tired&retired (Blessings)
[ Post Reply | Private Reply | To 1 | View Replies]

To: DUMBGRUNT
They hope to decipher, for example, why we can perceive the flashes in a blinking traffic light, but we don’t see the frame-by-frame action in a movie

Because the frequency of the traffic light is less than the frequency you see at. Likewise, for most people, in a movie the frame is refreshing faster than the eye does. But, it also has to do with motion, interlaced vs progressive, luminance, and a whole bunch of factors. Vision is really crazy complex
22 posted on 08/25/2019 6:47:57 PM PDT by Svartalfiar
[ Post Reply | Private Reply | To 1 | View Replies]

To: Fungi

“Amazing thing this human brain, brought to you by evolution over billions of years. /s”

Nope.

G_d made ‘em, in a whole bunch less time.

Evan Big Brains at Yale are catching on.


23 posted on 08/25/2019 6:50:15 PM PDT by Macoozie (Handcuffs and Orange Jumpsuits)
[ Post Reply | Private Reply | To 8 | View Replies]

To: Hardastarboard

“Believe half of what you see, son, and none of what you hear”

A line I heard often from my career Navy father!
I thought it was a Navy thing?

Years before Marvin Gaye.


24 posted on 08/25/2019 6:51:38 PM PDT by DUMBGRUNT ("The enemy has overrun us. We are blowing up everything. Vive la France!"Dien Bien Phu last message.)
[ Post Reply | Private Reply | To 17 | View Replies]

To: umgud

A person who is born blind has dreams, but doesn’t see images. Dreams could include sounds, tactile information, odors, flavors, and feelings. On the other hand, if a person has sight and then loses it, dreams may include images. People who have impaired vision (legally blind) do see in their dreams.Jan 23, 2019

What Do Blind People See? - ThoughtCo
https://www.thoughtco.com/what-do-blind-people-see-4153577


25 posted on 08/25/2019 6:54:10 PM PDT by DUMBGRUNT ("The enemy has overrun us. We are blowing up everything. Vive la France!"Dien Bien Phu last message.)
[ Post Reply | Private Reply | To 19 | View Replies]

To: DUMBGRUNT

We experience a dream guided by the senses.


26 posted on 08/25/2019 6:54:24 PM PDT by Moonman62 (Charity comes from wealth.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: DUMBGRUNT
For a visual area roughly one-quarter the size of a full moon, there are only about 10 nerve cells connecting the retina to the visual cortex.

I thoroughly HATE stupid analogies. What the hell does "one-quarter the size of a full moon" mean? Why can't a somewhat technical journal just specify area in square inches or millimeters or use some technical measurement?

The moon has a total surface area of 14,647,440 square miles. At full, half of it is illuminated. One-quarter of that is 1,830,929 square miles. Is the author saying our eyeballs have a visual area of 1.8 million square miles?

Or is Hartnett saying that the subtended arc of our vision is 1/4 of the arc of the full moon? That can't be as we would all have tunnel vision.

27 posted on 08/25/2019 6:55:34 PM PDT by ProtectOurFreedom
[ Post Reply | Private Reply | To 1 | View Replies]

To: Macoozie

“G_d made ‘em, in a whole bunch less time.” What is a “G_d?”


28 posted on 08/25/2019 6:55:36 PM PDT by Fungi
[ Post Reply | Private Reply | To 23 | View Replies]

To: dp0622

So when I see a really hot babe, am I really seeing one or imagining it??

That can depend.
Are you wearing beer goggles?
How late in the evening is it?
Are you lonesome tonight?...


29 posted on 08/25/2019 7:01:01 PM PDT by DUMBGRUNT ("The enemy has overrun us. We are blowing up everything. Vive la France!"Dien Bien Phu last message.)
[ Post Reply | Private Reply | To 20 | View Replies]

To: DUMBGRUNT

Good article. The summary would seem to be “Vision is impossible, yet we have it.”


30 posted on 08/25/2019 7:02:31 PM PDT by ProtectOurFreedom
[ Post Reply | Private Reply | To 1 | View Replies]

To: ProtectOurFreedom

What the hell does “one-quarter the size of a full moon” mean?

I took that as, the equivalent fraction of our field of vision. With or without the moon illusion, I don’t know?


31 posted on 08/25/2019 7:08:48 PM PDT by DUMBGRUNT ("The enemy has overrun us. We are blowing up everything. Vive la France!"Dien Bien Phu last message.)
[ Post Reply | Private Reply | To 27 | View Replies]

To: DUMBGRUNT

LOL

Beer goggles!! I remember those.

It has to do with relativity.

The same girl at 9pm in the club when you’re sober will ook FIFTEEN TIMES hotter at 3am with 14 beers in your.

The equation is

GIRL = BeerTime squared


32 posted on 08/25/2019 7:09:26 PM PDT by dp0622 (Bad, bad company Till the day I die.)
[ Post Reply | Private Reply | To 29 | View Replies]

To: DUMBGRUNT

THX


33 posted on 08/25/2019 7:09:42 PM PDT by umgud
[ Post Reply | Private Reply | To 25 | View Replies]

To: dp0622

It has to do with relativity.

2min 20 sec video
https://www.youtube.com/watch?v=Qh9ZZgDqzAg


34 posted on 08/25/2019 7:18:22 PM PDT by DUMBGRUNT ("The enemy has overrun us. We are blowing up everything. Vive la France!"Dien Bien Phu last message.)
[ Post Reply | Private Reply | To 32 | View Replies]

To: Moonman62

This model excludes the primary processor, consciousness itself.

Gamma rhythms are normally a synchronization in the subconscious theta frequencies when the overall consciousness reaches high gamma frequencies. The do called synchronized field they speak of is actually consciousness itself.

It would be difficult to detect true gamma frequency in primates as this frequency is usually associated o ly in humans after the prefrontal cortex has fully developed around age 25.

The gamma frequency is a much much higher frequency range that they present as it is the consciousness frequency of the mystics and is what gives them their abilities.


35 posted on 08/25/2019 7:32:53 PM PDT by tired&retired (Blessings)
[ Post Reply | Private Reply | To 26 | View Replies]

To: DUMBGRUNT

I don’t know. For not receiving much information from the eyes, the brain seems to divert much attention to visual input. At any time you are watching a speaker, and your eyes wander to another focal point, the ears quickly disengage. Stare out a window, look at an email, or just look at a table on a handout, whatever transpires audibly during that diversion is backburnered.


36 posted on 08/25/2019 7:35:27 PM PDT by Sgt_Schultze (When your business model depends on slave labor, you're always going to need more slaves.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: DUMBGRUNT

> “A lot of the things you think you see you’re actually making up,” said Lai-Sang Young, a mathematician at New York University. “You don’t actually see them.”

Those who have been abused by illogic in politics have known the above for eons.


37 posted on 08/25/2019 7:48:29 PM PDT by Hostage (Article V)
[ Post Reply | Private Reply | To 1 | View Replies]

To: DUMBGRUNT

My nephew with a Ph.D. in math works on optics at JPL for the space program. He’ll be all over this.


38 posted on 08/25/2019 7:50:12 PM PDT by Hebrews 11:6 (Do you REALLY believe that (1) God IS, and (2) God IS GOOD?)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SaveFerris

jExplains why up is down and right is wrong to Liberals.


39 posted on 08/25/2019 8:00:50 PM PDT by taterjay
[ Post Reply | Private Reply | To 13 | View Replies]

To: DUMBGRUNT

I just wish we could unsee se things.


40 posted on 08/25/2019 8:12:03 PM PDT by Phillyred
[ Post Reply | Private Reply | To 1 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-73 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson