Migraines, eye pain, blurry at best - all of these symptoms can be associated with viewing 3D images and videos. It turns out that three-dimensional technology is not for everyone.
- Unofficially, there was even a term for the inability to perceive 3D images. It is estimated that "stereoscopic blindness" affects up to 12 percent. - says Agnieszka Lembowicz, an optometrist from the Okulus clinic in Bielsko.
As ophthalmologists note, most patients reporting problems with watching films in three dimensions began to report after the premiere of Avatar. -Headacheandeye painare just some of the symptoms reported. Most often, however, patients complain about the lack of any three-dimensional effect - says Dr. Iwona Filipecka, who specializes in ophthalmic diagnostics.
3D image cheats the brain
3D technologiesrely a bit on tricking our brain. The eyes are spaced apart by the distance of the pupils from each other, so the image formed in one eye slightly differs from the image in the other. It is these differences that enable us to see stereoscopic (spatial) vision on a daily basis. In the case of 3D images (cinema, TV), it is necessary to mechanically separate the visual impressions from the right and left eyes by wearing appropriate multicolored or polarized glasses. Then the left image is seen only through the left eye, and the right image only through the right eye. By combining these two slightly different images in our cerebral cortex, it is possible to see depth stereoscopically. There are many reasons why not everyone is able to see 3D effects. - Since stereoscopic vision is a binocular phenomenon, monocular people will not see it. Sometimes, however, a significant domination of one eye is enough to have a problem with spatial vision. If the vision of one eye is significantly impaired due to amblyopia, severe visual impairment, macular disease, or a significant reduction in the transparency of optical centers, stereopsis will be impossible. The same applies to some strabismus, when the mechanism of single binocular vision is disturbed. Sometimes there is also no clear reason for the lack of stereoscopic vision, says Agnieszka Lembowicz from the Okulus Clinic. - Remember that we are born with the uneducatedsense of sight. We learn to look over time by providing our eyes with various visual impressions - adds the optometrist.
Learning three-dimensional vision
In some cases, especially in young children, the function of binocular vision can be trained. Early vision correction, amblyopia treatment, simultaneous perception and fusion exercises with an appropriate range towards convergence, exercises to increase the scope of convergence and accommodation are used. When the appropriate results are obtained during these exercises, specific exercises in stereoscopic vision should be started. There are many cameras for this. The first is a synoptophore with appropriate stereoscopic images and a cheiroscope. There are also many types of stereoscopes to enhance horizontal fusion, counteract suppression, and exercise the separation of accommodation and convergence (simultaneous eye movement).
Sometimes simple home exercises such as reading with a stick, threading buttons on a thread, assembling blocks, physiological splitting exercises, or examining stereoscopic images in an appropriate way can help to stimulate spatial vision. Such exercises also work well for people whose spatial vision has not developed without a clear reason and you can try to use them even in mature people.