Nintendo has warned that the 3-D screen on its new 3DS handheld game device shouldn’t be used by children 6 or younger because it may harm their immature vision. (Shuji Kajiyama/AP)

But Nintendo denies those claims, saying they have not heard of any above-average return rates. In a statement, Charlie Scibetta, senior director of corporate communications for Nintendo of America, said:

The number of calls and emails received by our customer support center regarding Nintendo 3DS is well below the rate experienced during past hardware launches, and there are no widespread issues. U.S. retailers are also not reporting Nintendo 3DS product return rates that are above normal. As always, people who have questions or comments about Nintendo 3DS or any Nintendo products can visit our support website at  http://support.nintendo.com or call 800-255-3700.

Nintendo announced last week that sales for the 3DS were the highest handheld sales in the company’s history.

Company statements have advised that players take frequent breaks during game play and dial down the three-dimensional effect if they feel dizzy or nauseated while playing with the device.

3DS owners: Have you experienced any discomfort while playing with the handheld? Has anyone decided to return it?

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Nintendo warns 3DS is not for younger gamers