Do you lose your 3D eyesight , one eye closed ? I dont get difference!

[Mustafa Umut Sarac]

I read an article about Rembrandt , he has stereo eye sight problem and his left eye 15 degrees abnormal from the focus.

Other information is drawing teachers always tells the students to close one eye to lose 3d eyesight to draw better.

I dont get any difference , neither gain nor lose anthing when I close one eye !

What is your experience ?

Umut

 

[wiltw]

Binocular vision is needed for depth perception. That is why optical rangefinders use TWO optics, offset laterally by some distance from each other. In WWII, warships used very large optical rangefinders—with a baseline of many meters—to measure range for naval gunnery.

 

[Mustafa Umut Sarac]

But Do yourself sense that binocular , monocular difference when you close one eye ?

 

[wiltw]

I do! When first reading the OP, I looked across the width of my home. With both eyes open, I have a sense of distance to the far wall, and relative distance to intermediate objects in the room. With only one eye open, I cannot guess the distance across the room, nor the relative placement of things at intermediate distances when I cannot see the floor in between, due to visual line of sight being blocked and preventing those visual cues.

It is like the difference of viewing a single photo vs. a stereo pair of images in a viewer.

Some people do not have a good sense of depth perception, which is why the military 'washes out' a lot of pilot candidates even before they start any training.

 

[Mustafa Umut Sarac]

This is interesting , I will ask to the doctor because I dont get any difference. Only the half of my sight closed and I see less. But I dont get any other loss of depth , distance and may be others.

 

[dpurdy]

I do see the difference. One eye closed and everything looks flat. Both eyes open and I see 3-D. Not only that but I see differently out of my left eye from how I see out of my right eye. I use my left eye for my camera and I see more creatively. When looking through my right eye I see more graphic shapes.

 

[Mustafa Umut Sarac]

wow , something is going on for me but I dont know what doctor would say ? Is there a eye doctor here could help ?

 

[summicron1]

3-d vision is something you learn when you are about 3 months old. If you truly don't see any difference, it is possible you had lazy eye as a child and didn't wear the eye patch over your good eye to force your bad eye to develop, in which case perhaps you never learned 3-d?

I'd get checked -- especially with things on the desk in front of you, the difference between 2 and 3-d should be very marked. At this stage, however, there's probably nothing you can do about it.

 

[Mustafa Umut Sarac]

Thank you , I will. I read an Harvard Medical School article found all 32 of rembrandts self portraits have a one eye 15 degrees shifted , total difference between two eyes sometimes exceeds 20 degrees. Half of his self portraits have 10 degree difference. They report that he has a stereo vision problem , cant see things in 3d and he paints 3d better than the normal vision.

May be I have a problem , I find leica images so exciting when they create 3d similar 2d. May be I see 3d only with some images.

 

[Vaughn]

The 3D affect is only good for about 60 feet -- farther than that goes back to 2D.

 

[Mustafa Umut Sarac]

I dont get difference, near field or far field.

 

[Mustafa Umut Sarac]

Let me ask another question , I can view stereo images 3d or holograms 3d. Is it still possible I have 3d vision problem ?

 

[AgX]

Place someting in the airspace in front of you, like the head of desk-light.
It should be in the region of your good vision, with your glasses on.
Then aim at a certain point (edge etc.) and with one eye closed try to reach it directly and fast with your finger.
Repeat it with both eyes open.
In case you do not experience it working far better with both eyes open, there is something wrong with your stereo-vision.

 

[Gerald C Koch]

You do lose your depth perception when you close one eye. However the brain is very adaptive and uses the perceived relative size of objects to compensate for the loss. Thus the brain assumes that a little car is far way but a large car is near.

There is another problem when drawing. With both eyes we see a bit more than 1800 of a subject. However we must draw in two dimensions. This is confusing to the brain. Picasso realized this and played with it putting a person's two eyes on one size of the profile in many of his paintings.

 

[Mustafa Umut Sarac]

Picasso expl. was excellent Gerald. I dont know , I dont feel anything different one eye closed. I think AgX test was saying to me there was a difference but I am not sure. I dont know how strongly people feels or I might feel one eye closed. I wrote to my sister , We will discuss tonight .

 

[Theo Sulphate]

In addition to the test AgX described, how easy is it for you to put thread through a needle?

With two eyes open (3D), it should be easy. With one eye, somewhat difficult.

By the way, that photo of you is very good. I like it. Did you use a self-timer or did someone else photograph you?

 

[Mustafa Umut Sarac]

Dear Theo , My sister took the avatar with digital at an old underground cafe , I simulated Agfa APX 25 with DxO and here we go. Digital is may be good but I cant take single good picture with annoying screen , may be I am outdated but still prefer leica fed zorki 1 series. There is huge difference between my digital and film photographs , I lose myself.

I will try needle trick.

Thanks,
Umut

 

[BAC1967]

The 3D affect is only good for about 60 feet -- farther than that goes back to 2D.

Like Vaughn said, the effect diminishes with distance. I use a View-Master stereo camera where the lenses are set at the same distance apart as an average persons eyes. I have read that the stereo effect is lost after about 30 feet so the best use of the camera is with close subjects.

 

[Alan Klein]

Here's one test http://www.mediacollege.com/3d/depth-perception/test.html
Here's another http://www.vision3d.com/frame.html
Another but you need one of the movie 3D glasses with the two colors. http://3d.mcgill.ca/

 

[Mustafa Umut Sarac]

Alan , I tried your first test and successfully passed. I think I have no problem. But it might not be excellent , when I throw cola cans to a street garbage can , it never hits the middle but right corner , three times happened , I believed Childhood , it was always difficult to play football. And I never experienced some Leica images with my bare eyes .

 

[Mustafa Umut Sarac]

BAC1967, Hello, I can see 3d holograms and stereograms if it does mean something.

 

[Old-N-Feeble]

Some people can't see 3D depth. My oldest brother was hit by a car (fifty years ago) when he was a teenager and one eye is slightly off-center. He was in a coma for several days and when he awoke, he'd lost his 3D vision.

 

[Mustafa Umut Sarac]

Best wishes to your brother Old N Feeble.

 

[Old-N-Feeble]

Best wishes to your brother Old N Feeble.

Thank you, Mustafa but that happened fifty years ago. I edited my post.

 

[Michael Guzzi]

This thread confirmed that I do have some quite severe impairment in depth of field perception.

But it doesn't really surprise me, when I was about 5 or 6 I got corrective surgery to my right eye (some muscle/tendon/whatever was too short and causing it to be "crossed" in relation to my right eye), and I do have quite a bit of myopia on my left eye, and strong astigmatism on my right on top of that...

About that "lazy eye" thing, I had to use a patch over the right eye after the op till it healed, took some 3 months. I do feel like it is lazy, there seems to be a lack of info from that side, like my brain ignores it, maybe to avoid confusion. When I took the test of the green dot, there was both a vertical and horizontal displacement of the dot. it seems I basically see as a person who only can see with one eye. Unlike Mustafa, I could never see holograms properly, nor use binoculars. I've never watched a movie in 3D, but it would probably not work for me. Oh well. I've learned to live with the constraints.

It IS a major PITA for driving though, so much so, I don't have a driver's license. Not because I failed the tests or anything, I believe I would pass. I just don't trust myself driving 1500 kg of steel at 80-100 km/h.