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.