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The Nintendo 3DS, like its predecessor, features two screens. However, the top screen is widescreen and capable of displaying 3D graphics without the need for 3D glasses, while the bottom screen is a touch screen. The bottom screen is unable to display 3D graphics, as it would be impractical. While not confirmed, scratches may also have played a role in the omission of 3D on the bottom screen. 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. The 3D slider was made in order for players to find their preferred 3D depth. Those who wish to turn it off completely (either if they want to or if they can't see 3D due to myopia) are allowed to do so. Nintendo has made statements that the 3D technology allows long periods of play without eyestrain. Nevertheless, they have discussed the possibilities of implementing a feature in games that suggests that players take a break every once in a while, like the Virtual Boy, and have reportedly suggested that third party developers do the same. Actually, Super Street Fighter IV: 3D Edition features that, telling the player immediately after starting the game from the 3DS Menu that he/she must take a break after 10 minutes of play with 3D activated.
The 3DS contains several other enhancements over the previous Nintendo handhelds. The Nintendo DSi and Nintendo DSi XL both had a camera built on the inside and outside of the system. This returns with the 3DS, though this time there are 2 lenses on the outside camera, with both of them being only slightly separated so that, when the player takes a picture, it can be viewed in 3D. The inside camera is now stationed above the top screen rather than on the hinge (as the DSi and the DSi XL) and can still only take 2D pictures. As of December 2011, the 3DS is also capable of recording 3D videos up to 10 minutes long.
Another thing on the 3DS is the Circle Pad. Similar to an analog stick, the circle pad is the first of its kind on a Nintendo handheld. The standard buttons present on the Nintendo DS are also on the 3DS, including the face buttons (A, B, X, Y), Start and Select, the D-Pad, and the shoulder buttons (L and R). A new button called the HOME button, similar to the one featured on the Wii Remote, allows players to instantly go to the 3DS's home menu and switch between other games & apps. Doing this will not stop the progress the player made in a video game as they are capable of going back to where they were by pressing the home button again.
