What does it feel like to see something without a sense of three dimensionality?

Anyone who has watched a stereoscopic movie knows that a stereoscopic movie is so good because it has a deeper feeling than ordinary movies, that is, a three-dimensional feeling. It not only shows a flat picture, but also distinguishes between front and back, near and far, giving you a sense of immersion. How is the three-dimensional sense of human beings formed?

This is a complex issue. As you know, when you look at an object in front of you with both eyes, the object forms a clear image in the corresponding part of the retina of both eyes, and then conducts it to the cerebral cortex, and the cerebral cortex center fuses them into an object image, which is called fusion function. Also, when you look at an object with both eyes, there is always a small difference in the angle of the two eyes, if you look at a glass of water in front of you and then alternately block the eyes, you will find that the right eye is seen at a slightly right angle, and the left eye is seen at a left-side angle.

This shows that when the two eyes look at things, due to the different positions of the two eyes, their respective angles are different, so the image formed on the retina must also have small differences. According to this principle, people can distinguish two objects at different distances, that is, stereoscopic perception. Human stereoscopic perception is limited, and objects that are generally more than 500 meters away are very close to each other on the retina, so the sense of depth of the two objects cannot be distinguished.

Three-dimensional sense is the visual function of human eyes, and monocular has no three-dimensional sense. Three-dimensional sense is very important to people's life and work, without three-dimensional sense can not distinguish the distance and depth, which brings a lot of inconvenience to people's lives, so that many people lose the ability to do fine work.

If you go to the ophthalmology department of the hospital for a check-up, it may be a problem with stereoscopia.

When the human eye sees things, it is easy to have a three-dimensional feeling, and various reasons can cause corneal opacity, corneal changes, lens opacity, vitreous opacity, etc. Partial opacity of the glass, opacity or hemorrhage of the inflamed glass, early reticular. Combined with scotoma, macular hemorrhage, macular detachment, mid-talk fluid swimming plasma, posterior visual nerve meridian inflammation, mid-retinal scarring, retinal central membrane, pericardial changes, myopia, macular deformity, etc.

<> plane visual stereo perception is the effect mapping on the plane, which is very attractive to the plane, therefore, the establishment of three-dimensional sense is also a common method in the process of typesetting. Planar stereo projection is the use of the foresight of the human eye to create parallax on the screen and create illusions in the human eye, thus creating a three-dimensional effect.

Flat stereoscopic is caused by the visual difference of the human eye. Usually we see an object that can distinguish between the front and the back because there is a certain distance between the two pupils and the eyes see different parts of the body or adjacent objects. Close your eyes and look at the same thing, and you will realize that the volume of your body that you see with your eyes is different.

Spatial stereoscopic and planar stereo are interrelated. However, in order to express the three-dimensional effect, space designers must combine three-dimensional spatial structures and materials. This is the result of the binocular effect, when a person's eyes are at a distance of about 10 cm, when they look at an object, both eyes are looking at the same object, and by looking at two ** that reflect different sides of the same object, the brain consolidates and becomes a stereoscopic image.

Observing the object in one eye, seeing a flat surface, lacking depth, I can't believe that a small cotton puncture experiment can be done to confirm this. As for the eyes to see, what else is stereo, that is life experience to determine. When the eye sees things, only the external image of the body is perceived by the optic nerve cells.

In order for us to see the body subjectively, we also need to go through complex emotional pathologies, such as the optic nerve, all the way to the center of the visual cortex at the back of the head. A comprehensive analysis of the center, including analysis of binocular images that are not identical, will be completed.