Czech scientists have warned films or broadcasts of sporting events in three dimensions may cause problems transition between virtual and real world.
Josh James has had a car accident half past one after seeing the film in 3D Alice in Wonderland. He is convinced that these two events are not unrelated. This technology is so dangerous is that? Certainly, Avatar has created excitement, but it has also caused discomfort in some people. Many had to remove their glasses and leave the cinema, and it took them several hours to recover from their three-dimensional experience.
Headache, burning eyes and itchy eyes, loss of orientation, headache, nausea, and even, at worst, epilepsy or heart attacks: all these can result from watching movies in three dimensions by people sensitive or susceptible. Josef Syka [1], Institute of Experimental Medicine in Prague [2] says that the main problem comes from the brain: "The spatial vision is based primarily on the fact that each eye sees our space a little differently ".
The technique is also used for relief images. But this is not the only principle of binocular vision. Other mechanisms are at work, however, we can use when viewing images in 3D. Our eyes are while focusing on the screen to be born a virtual space. Surely there that are embarrassed, or nausea experienced by many people to view the animation in three dimensions. Martin Filipec [3], an ophthalmologist at the Eye Clinic Lexum European [4], confirms: "Yes, between watching the real world and the world in 3D on television or film, there is a major optical difference." Indeed, normally, each eye is regulated according to the remoteness of the observed object, which can be accomplished in the virtual world. In the latter, a conflict arises between the fields of convergence of the eyes, since them to see the three-dimensional image must both be adjusted depending on the distance that separates them from the screen and one that separates them from the object seen in three dimensions, perceived as being closer.
This conflict can cause headaches or other problems. Nevertheless, Martin Filipec ensures that all these drawbacks are only temporary. Josef Syka adds that the same type of effect can be felt when one looks for too long blurred images. Collect images in three dimensions for several hours can not be dangerous, especially for adults whose vision mechanisms are sufficiently secured. It also stresses that in ten adults has a failing vision, which prevents them from having normal stereoscopic vision. In fact, people with disabilities after watching 3D images should seek medical advice as these disorders might reveal a lack of vision.
Play a lot with the new technology, experts say, is not recommended for individuals who have been subject to seizures or heart attacks. However, this warning is more related to the intense sensations caused by such activities as the problems posed by the principles Three-dimensional technology.
The main debate on the 3D TV actually turns around children. Josef Syka insists that many hours in front of three-dimensional images can alter development of the latter and the interaction mechanisms of spatial vision. Filipec Martin is also in this direction, but states that this theory does not hold. Another expert thinks, meanwhile, that watching movies in 3D is not likely to cause vision problems, but may actually contribute to child development. For Martin
Filipec, technology 3D films must be improved to cause the least possible disturbance to a minimum of people. Furthermore, additional information must be provided to the public on the best way to watch movies in three dimensions. So if you're not sitting in the middle of the movie, this causes a distortion that can result in discomfort. Similarly, the more one is close to the screen, the greater the likelihood of experiencing problems.
Other scientists emphasize that research should focus primarily on the use of risky small screens within walking distance of the viewer, as it is when it is near screen that the conflict between the fields of ocular convergence is most important.
For more information, contact:
- [1] Address of Mr. Josef Syka Prof. Josef Syka, MD, DSc, budova LA, Patro 2, Misto 2008, Department of Auditory Neuroscience, Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, vvi, Videnska 1083, 142 20 Praha 4 - tel. : (00420) 241 062 700, fax: (00420) 241 062 787, Email: syka@biomed.cas.cz
- [2] Website of the Institute of Experimental Medicine, Academy of Sciences of the Czech Republic : http://www.iem.cas.cz/ (English)
- [3] M. Martin Filipec Contact: Prof.. Filipec Martin, MD, CSc., European Eye Clinic Lexum, U Společenské zahrady 3, 140 00, Praha 4 - Krc - tel. : (00 420) 596 117 842, fax: (00 420) 244 016 440, Email: lexum@lexum.cz
- [4] Website of the European Eye Clinic Lexum: http://www .lexum.cz / index.php? p = en01 (English)
Source:
http://technet.idnes.cz/tec_video.asp?c=A101211_1497470_tec_video_vse
Editor:
Viviane Locuratolo (viviane.locuratolo @ mail.muni.cz)
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