The 3DS does hurt your eyes because I own the 3DS so if you want more infomation about it message on the message board. The 3DS has joystick and a D-Pad which are used for playing your games with the Home, Start and Select button are at the bottom of the 3DS. You can turn the 3D on or off if your like me and like the damn 3D off then do it. Say if you were in a middle of a game and you clicked Home it will send you straight to the Homepage and you can go on something else. Streetpass is say you walk down the street with your 3DS on Sleep Mode and someone else has theres on Sleep Mode then you can add then as a freind and play there game with them or againist.
The 3DS is worth the money so if I was you buy the 3DS today.