system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: 3D that doesn't require glasses, like the Nintendo 3DS

So I'm wondering how the 3D on the Nintendo 3DS works specifically (as I own one), or any other 3D device that doesn't require glasses. I know that it has to do with multiple screens but that's where my knowledge ends.
gpt
It works because the LCD screen on a 3DS is not your conventional LCD. It uses a technique that basically splits the images sent to each eye based on the angle the eye is to the display. You know those funky strips that changes the picture when you move it? (also super fun to scratch and make those sounds) It's a similar effect, only your brain interprets the result as 3D even though it isn't in the sense of everyday objects that you can hold.