Samsung - a pioneer of 3d TV technology - trying to reduce legal risks, published on its web site a detailed list of precautions for those who plan watching Samsung 3d TV sets.

The first concern is about glasses: fluorescent lighting may cause a flickering effect and direct sunlight may affect the operation of the 3D glasses.

Then it goes on health warnings. It is presented similar to drugs' instructions. They claim that some viewers may experience an epileptic seizure or stroke when exposed to certain flashing images or lights contained in certain television pictures or video games. So you need to consult with a medical specialist if you or any of your family had epilepsy or stroke in the past.

You should stop watching 3D and see a doctor if you have altered vision; lightheadedness; confusion; dizziness; involuntary movements;  nausea; convulsions; cramps; and/or disorientation. Parents should pay closer attention to children watching 3D TV. Viewing in 3D mode may also cause motion sickness, perceptual after effects, disorientation, eye strain, and decreased postural stability. You should not watching 3D if you are in bad physical condition, need sleep or have been drinking alcohol. Be aware that watching TV while sitting too close to the screen for an extended period of time may damage your eyesight. Watching TV while wearing 3D Active Glasses for an extended period of time may cause headaches or fatigue. Some viewers may experience disorientation.