All of you must have seen stereo images for the eyes on the back of school notebooks at least once. Someone managed to see the three-dimensional image hidden in them immediately, someone could not see the three-dimensional image, no matter how hard they tried. In fact, only 1% of people on earth are not able to see a three-dimensional image. The rest just need eye training.
What are eye stereo images?
Stereo pictures, or otherwise SIRDS (Single Image Random Dot Stereograms), arose at the intersection of several sciences. These are 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 three-dimensional 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 will intersect. The farther away from us the object we are looking at, the sharper the angle of the rays will intersect. Depending on the angle at which the gaze is directed, the brain infers the distance to the object.
What happens if we look at an image with repeating shapes that are almost indistinguishable from each other? The brain in this case will combine the corners incorrectly, and the person will see something that is not actually in the picture. The most interesting thing is that the non-existent image will turn out not flat, but three-dimensional.
Why should we look at stereo images for the eyes?
Benefits for vision
It turns out that looking at stereo images is not just entertainment. Such an activity, according to ophthalmologists, benefits our vision.
Namely:
- Eye accommodation improves. This is due to alternate tension and then relaxation of the eye muscle. In turn, such actions improve vision, make it clearer.
- The blood circulation in the eye muscles increases. This protects your eyes from low or high blood pressure.
- Brain activity is being trained. Increases concentration and alertness. The speed of brain reactions increases.
- Stereoscopic vision skills develop.
It is important to blink regularly while looking at stereo images for the eyes. Complicated stereo images that take a long time to look at cause dryness of the cornea in the eye, which in turn can lead to redness and pain in the eyes. When a person blinks, the tear ducts are irritated,moisturizing the eyes, and drying of the cornea does not occur.
According to the above, it can be concluded that large stereo images for training the eyes in full screen are less beneficial for vision than stereo images of regular sizes.
Pros of stereoscopic vision
To survive in the wild, man was given by nature a lot of all kinds of means. These are thinking, memory, imagination and stereoscopic vision. Such vision allows a person to accurately assess the distance to surrounding objects, determine the shape and volume of an object located at a considerable distance from us.
Stereoscopic vision is extremely important for people in such professions as a basketball player, football player, driver, designer, surgeon, pilot, dentist, architect, and many others.
Thanks to 3D vision, we can easily thread a needle, catch a ball, pour water into a glass, drive a car, step over obstacles, shake hands with friends and look at stereoscopic drawings.
How to view stereo images
It's best to view images on paper, not from a computer screen. Therefore, if possible, print the picture. It is not necessary to use a color printer. A picture printed on a black and white printer should be considered as good as a color picture.
Now bring the image to the nose, lookblurred, as if in the distance, so that the focus of view was behind the image.
Slowly move the design away from the nose. At the same time, continue to look not at the picture, but into the distance. If you get lost and distracted, start over.
The image will become three-dimensional approximately at the distance of the arm bent at the elbow.
When you see a clear image in the foreground, and everything else becomes like a background, the stereo effect is achieved.
The most important thing in looking at stereo images is the ability to focus on the image for quite a long time.
Exercises for training three-dimensional vision
Exercise 1 with a mirror.
You need to stand in front of the mirror and look alternately at your own 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 will appear.
Exercise 2.
Bring the stereo image as close to your eyes as you can. Wait for the gaze to defocus by itself.
Slowly move the image away from the face until a three-dimensional image appears.
Exercise 3.
An ordinary person is used to always look with both eyes at one point. In this exercise, you must try to look with each eye at different objects in the stereo image. Doing this exerciserequires training, but over time, everyone masters it.
Conclusion
Looking at stereo images for the eyes is not only a way to have fun, 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 keep your eyes properly moistened. Also consider paper, printed images, not those on the monitor screen.
