So how has Nintendo created a device that allows for 3D without the glasses? It’s all about a subtle trick of the brain.
The Nintendo 3DS uses a familiar technology called stereoscopic 3D, explains Hideki Konno, the hardware designer who helped created the handheld device.
For those who have never heard of stereoscopic 3D, here’s how it works: The display shows two images, one for each eye to view. When the left and right eyes see each image, the brain processes them together to give the illusion of 3D depth.