The Great 3D Headache!
Posted by Rob on Wednesday Jul 27, 2011 Under Miscellaneous, Need to know, New TechnologyIt is official! A new study funded by Samsung and performed by researchers at the University of California-Berkeley discovered that viewing a 3D image can cause headache and eyestrain in some people. If you are a glutton for punishment you can wade through the original paper here, or you can read about it here or here or here.
Yes, there are a few articles out there about this research. Some of the writers actually read the paper while others merely read the article about the paper to write their article. Most of them missed the point of the paper completely.
Long paper short – the focus of the study was not to discover that 3D causes headaches and eyestrain (which we already knew) but to figure out why it caused them. We can now blame “vergence–accommodation conflicts” for the problem. When we watch a 3D image on a screen our eyes do not resolve on a single focal point like in normal viewing but have at least two focal points – the screen and the image that appears either behind or in front of the screen. These two focal points are at different distances and therein lies the problem.
They also discovered that there is a relation bewteen the viewing distance from the screen and headaches, eye strain and dizziness. If you are watching a 3D movie at a theater and get a headache or dizzy, move closer to the screen. That will reduce the problem.
The hope is now that there is hard data on why some people get headaches and dizzy watching 3d content, film makers, theater designers and engineers will figure out a way to reduce or even solve that problem.














