All of you have probably at least once seen stereo pictures for the eyes on the back of school notebooks. Someone managed to see the volumetric image hidden in them immediately, someone could not see the volumetric image, no matter how hard he tried. In fact, only 1% of people on earth are not able to view a three-dimensional image. The rest just needs eye training.
What are stereo pictures for the eyes?
Stereo pictures, or SIRDS (Single Image Random Dot Stereograms), arose at the junction of several sciences. This is mainly optics, psychology, physiology and some others.
Most people see objects around them with two eyes. They look at the object with each eye separately, and then the brain makes one volume image from two pictures of each eye.
If we imagine that our eyes emit two rays, at the moment when we look somewhere, at the point where our gaze is directed, the rays intersect. The farther away from us the subject we are looking at, the more acute the rays intersect. Depending on the angle at which the gaze is directed, the brain makes a conclusion about the distance to the object.
What happens if we look at an image with repeating shapes that are almost indistinguishable? In this case, the brain will not combine the corners correctly, and the person will see what is actually not in the picture. The most interesting thing is that a nonexistent image will not be flat, but three-dimensional.
Why should we look at stereo pictures for the eyes?
Benefit for vision
It turns out that watching stereo images is not just entertainment. Such an activity, according to ophthalmologists, benefits our eyesight.
Namely:
- Eye accommodation is improving. This is due to alternating tension and then relaxation of the eye muscle. In turn, such actions improve vision, make it more clear.
- The circulation of blood in the eye muscles is enhanced. This protects your eyes from low or high blood pressure.
- Brain activity is being trained. Increases concentration and mindfulness. The speed of brain reactions increases.
- Stereoscopic vision skills are developing.
It is important to blink regularly while looking at stereo pictures for the eyes. Complex stereo images, which take a long time to look at, cause the cornea to drain in the eye, which in turn can lead to redness and pain in the eyes. When a person blinks, tear channels moisturizing the eye are irritated, and draining of the cornea does not occur.
According to the above, it can be concluded that large stereo images for training the eyes on the whole screen are less useful for vision than stereo images of normal sizes.
Pros of stereoscopic vision
To survive in the wild, man was naturally given a variety of various means. These are thinking, memory, imagination and stereoscopic vision. Such vision allows a person to accurately assess the distance to objects surrounding him, to determine the shape and volume of an object located at a considerable distance from us.
Stereoscopic vision is extremely important for people of such professions as a basketball player, soccer player, driver, designer, surgeon, pilot, dentist, architect, and many others.
Thanks to volumetric vision, we can easily thread a needle, catch a ball, pour water into a glass, drive a car, step over obstacles, shake hands with acquaintances and look at stereoscopic drawings.
How to view stereo images
It is best to view images on paper rather than from a computer screen. Therefore, if possible, print the picture. Using a color printer is optional. A picture printed on a black and white printer should be viewed as well as a color one.
Now we bring the image to the nose, look blurry, as if into the distance, so that the focus of vision is behind the image.
Slowly move the pattern away from the nose. In this case, continue to look not at the picture, but into the distance. If you get lost and distracted - start over.
The image will become voluminous at about the distance of the arm bent at the elbow.
When in the foreground you see a clear image, and everything else becomes a background, the stereo effect is achieved.
The most important thing in viewing stereo images is the ability to keep the focus of view behind the image for quite some time.
Volumetric Exercise Exercises
Exercise number 1 with a mirror.
It is necessary to stand in front of the mirror and look alternately at one’s reflection, then at the surface of the mirror itself. Repeat for 2-3 minutes.
The essence of this exercise is as follows: your reflection is the place where you need to concentrate your eyes when viewing stereo images, and the surface of the mirror is the stereo image itself, the place where the three-dimensional image appears.
Exercise number 2.
Bring the stereo image to your eyes as close as you can. Wait for the gaze to defocus itself.
Slowly move the image away from the face until a three-dimensional image appears.
Exercise number 3.
An ordinary person is used to always look at one point with both eyes. In this exercise, you must try to look with each eye at different objects in the stereo drawing. Performing this exercise requires training, but over time, everyone will learn it.
Conclusion
Looking at stereo pictures for the eyes is not only a way to spend time interestingly, but also an opportunity to improve your vision, increase its clarity and normalize eye pressure. To benefit from this activity, remember to blink regularly to properly moisturize your eyes. Also consider paper, printed images, and not those on the monitor screen.