Is 3D tv harmful for health ?

Is 3D tv harmful for health ?

Scientists  and researchers say Avoid 3D TV as it can disorient the brain, causing eye strain, headaches, nausea and sickness, scientists warn.

3D TV can be harmful

When buying a 3 DTV , Viewers will have a choice between two types of 3D TVs - active and passive - which show the 3D images in different ways.
An active TV normally will cost less that a passive 3d tv, but will require special 'shutter' glasses. The basic idea is that the TV displays the  3D programme  or movie in a series of rapidly alternating frames - left eye, right eye, left eye, right eye - changing at such a speed that the viewer cannot even detect it is happening. The shutter glasses, which cost 20 to 40 USD a pair and are powered by a small battery, block out one eye or the other on alternate frames at the same high speed, synchronizing with the image being displayed on TV via a wireless connection to the set. The brain is thus fooled into creating a 3D image in the mind's eye.

3D Tv warnings for health

The  3d tv passive technology relies on a special polarising filter on the TV set to split the image into its left eye - right eye components. The split picture is then watched using a simple pair of polarising glasses - similar to the ones handed out in modern 3D cinemas - to create the 3D image.

The closer the viewer is to the screen, the worse it feels, making 3D TVs more problematic than cinema screens. Researchers at Eindhoven University in the Netherlands asked 39 people who could see 3D to read some text on a screen 10 feet away. Seven of the group suffered symptoms that can lead to nausea, including double vision and eye.

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