Interview: Tut 3D really hurt?
If you read the latest warning from the manufacturer Samsung, compaq battery, quickly has the impression that 3D films can harm their own body. Of epileptic seizures and stroke there is the question. News.de explains what’s behind it.
Epileptic seizures, strokes, dizziness, and disorientation – the list with the side effects of 3D, in which just warns electronics manufacturer Samsung is long and reads like the information in a questionable drug. Several media reports have already taken this warning and here we read of theories, which state that could benefit from the 3D result in the loss of spatial vision. But what’s really behind it?
"Samsung is cautious and trying to hedge against potential liability claims by them against every possible side effect warning," says Marty Banks, professor of optometry and Sehwissenschaft at Berkeley University. He no evidence is known that 3D movies or television can have such drastic consequences for its viewers. However, the professor is cautious, adding: "There are, however, there is no clear evidence against." It lacked long-term studies, and intensive research to provide reliable answers, "There is just common sense."
The struggle of the eyes
Eye fatigue and discomfort, according to Banks, however, are known side effects and can be explained simply. When we watch a 3D film, then the eye must perform movements that are in a real environment completely unnatural. It might be a conflict between the vergence eye functions and accommodation. Vergence is the eye movement to look at an object. In a natural environment, the eyes are aiming at only a single object and not two. At the same time that an object focused by the eyes and in focus – this process is called accommodation. This changes the curvature of the lens. In a natural environment, the two processes relate to an object at the same distance.
"On a 3D canvas suspended this coupling", says Banks. While the eyes must constantly thinkpad x61s battery focus on the screen itself, it happens that objects pop out again and again from the screen or behind it lie. "The visual system must therefore fight against the natural pairing and this can be shown to have eye pain, blurred perception or even" cause headaches, says the professor.
Progress reduces conflicts
The fact that some spectators roaring with skulls from the 3D cinema is lying, especially because the distances between screen, projector and viewers often are not optimal, also knows Michael Bönnhoff of the production and post production digital images to report.
In the old 3D versions – some with blue-red glasses – that was much worse, because: For the analog 3-D film was needed, two different copies of the film, each for the right and the left eye. These were then played through two projectors that had to be accurately synchronized to each other. This worked only rarely. The result: right and left eye saw images that did not fit together.
But still blur on the screen play a trick on the brain. The same applies to the rate of reproduction. Bönnhoff is convinced that these problems are corrected in the next few years.
Until then, viewers can even do something about the headache of 3D cinema. If he sometimes let not be completely avoided, but the problem could be diminished by the fact that movie-goers put as far away from the screen, so Banks.
Great improvements have been the digitization of the 3D film, but already, because: "The digital era allows producers to better match the images with each other and to minimize the differences sony vgp-bps8 battery in both eyes low in order to reduce conflicts", says Blanks.
Conversion of producers
"Modern projectors can now work with pinpoint accuracy in order to" superimpose the images, which are highly cameras Doppelobjektiv, Bönnhoff makes clear. In the future, it is also an object of the playwright, makeup and lighting technicians to implement the special 3-D conditions better.
But there are problem areas that need to be resolved elsewhere. For example, ten percent of all people worldwide are not able to see space. For them, the 3D experience is also difficult to access in the future. Meanwhile, the effect is unclear, the spatial cinema has on children. "With them we know indeed canon lp-e6 battery that they can see with space for about four years. But when will it really make sense for them to 3D perception, it must "first be explored, is Bonnhoff convinced.
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