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Nintendo has made statements that the 3D technology allows long periods of play without eyestrain. Those who wish to turn it off completely (either if they want to if they can't see 3D due to myopia) are allowed to do so. The 3D slider was made in order for players to find their preferred 3D depth. The player is able to adjust the depth of the 3D via a 3D slider Nintendo implemented on the right side of the upper screen of the handheld. While not confirmed, scratches may also have played a role in the omission of 3D on the bottom screen. The bottom screen is unable to display 3D graphics, a decision made by Nintendo due to the abundance of smudges that would obscure the images produced, as well as the fact that the hand of the player and a stylus would get in the way. The top screen is widescreen and capable of displaying 3D graphics without the need for 3D glasses, in a process called autostereoscopy, while the bottom screen is a touch screen. The Nintendo 3DS, like its predecessor, features two screens. The system is also able to provide optimal comfort levels, as shown by the 3D depth slider and adjustable telescopic stylus. As with the Nintendo DSi, the Nintendo 3DS has a camera function, however, the outer camera is composed by 2 lens, similar to the human vision, enabling owners to take pictures and view them in 3D. The system is motion and gyro enabled and features analog circle controls, referred to by Nintendo as a 'Circle Pad', a first for a company handheld. It is backwards compatible with Nintendo DS and Nintendo DSi games.
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One of the most noteworthy features of the handheld is the ability of the upper screen to display 3D without the need for glasses in a technique known as Autostereoscopy. It succeeds the first Nintendo DS line of systems. The Nintendo 3DS is an eighth generation Nintendo video game handheld released on Februin Japan, Mafor Europe, Main America and Main Australia.
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