You can watch normal (2D) TV as well on a 3D TV, as the 3D capability can be switched off.
Some TVs, such as the Samsung 51D490 51” Plasma TV have 2D to 3D convertor capabilities which converts current games and DVDs to 3D.
Direct sunlight and some devices that emit IR frequencies, such as fluorescent lights can interfere with 3D glasses.
There are some health risk warnings regarding 3D TV in the fine print, especially for photosensitive viewers.
Warnings include:
- motion sickness, perceptual after effects, disorientation, eye strain and decreased postural stablility.
- Epileptic seizure or stroke when exposed to flashing images or lights.
- Headache and fatigue.
- Disorientation for some viewers