This might help

The upcoming launch of Nintendo's 3DS is getting people pretty excited as they imagine their first glimpse of true 3D gaming in the palm of their hand. For 12% of those giddy gamers, however, the moment could be a disappointing one.

According to British charity The Eyecare Trust, as many as 6m Britons can't properly process 3D images due to visual impairment. The charity claims a quick eyetest can detect such a problem and that treatment could be as simple as a new pair of glasses or some "vision therapy", which we imagine to be rather like retail therapy only with less purchasing.

Perhaps Nintendo could include a coupon for a discount eye test with every 3DS sold.