Updates to this story
Nintendo has warned that children under six should not use its 3DS handheld gaming console, saying prolonged exposure to 3D images could negatively impact on the development of children's eyes. Not that it's a revelation. We reported that as fact at the beginning of the home 3D telly boom.
The health warning was hidden at the bottom of Nintendo's Japanese website, according to the Wall Street Journal.
Nintendo suggests that children younger than six only use the 2D option on the 3DS, which means a normal DS would be more appropriate. The 3DS features a slider that allows 3D to be turned on or off.
This warning for young children has also been given by other manufacturers of 3D devices, including Samsung, Sony and Panasonic, but that hasn't stopped parents from handing over the extra admission to appease their children with 3D films.
The health risks of 3D aren't limited to kiddies. Nintendo warns that older children and adults should take breaks after 30 minutes of exposure to 3D and should stop immediately if they feel unwell. Let's not forget that some people can't experience 3D at all.
The long-term physical implications of 3D are not well documented, but TechEye spoke to a number of researchers earlier this year about the effect 3D can have on the human body. Eye strain and headaches are likely short-term repercussions of exposure to 3D. Some are worried that, long term, we just don't know.
A professional suggests that the cut off age shouldn't be six but eight as eye muscles are still developing. But Nintendo and the rest wouldn't want to miss out on two sweet years of heavy sales and demand..
The 3DS features an autostereoscopic display which allows 3D to be displayed without the need for special glasses. It will launch on the 26th February.