Almost all people have binocular vision. That is, with two eyes we see the image in volume, we can compare the distance between objects and their distance from us. This feature of human vision allows us to view stereo images.
It is necessary
Computer monitor or color printer
Instructions
Step 1
The stereoscopic image effect is based on the capabilities of our vision. In a healthy person, both eyes focus on an object, the brain compares the data received from each eye and, comparing it with the angle of view, makes a single picture. Thanks to this, we see the world as three-dimensional, not flat. Learning to look at stereograms is not difficult. To begin with, get close to the image, so that focusing is simply impossible. Then begin to slowly move away from the screen (or move the sheet away from you). Gradually, some elements of the picture will zoom in and others will recede until you see a clear 3D image. It is undesirable to "run" with your eyes and blink - the effect may disappear and you will have to start watching from the beginning.
Step 2
The second option to learn how to look at stereograms involves defocusing the gaze away from the picture. You need to place the screen or printout in front of you and look ahead, not at the image, but as if through it. Then slowly and carefully zoom in and out of the picture until you see the changes occurring on it. One of the secrets of this skill is to make "eyes in a bunch", and then gradually clear vision. Don't be discouraged if you can't immediately see the "magic" image. You have been unconsciously learning to focus your vision on an object all your life, it is not surprising that it is not so easy to unlearn.
Step 3
The easiest place to start is with images that have two dots (dashes) printed on them. You need to relax your vision so that instead of two points you get three. Without changing the focus of your vision, look a little below and you will see kind and affectionate animals.
