How Screens Prevent The Tearing Effect

To keep your screen image smooth, your computer draws the next frame in a secret hidden buffer. Only when the image is fully ready does it swap with the one you see, preventing visual glitches.

Without this trick, your display might show a half-drawn frame, resulting in an ugly horizontal tear across your screen. By using multiple memory buffers, the computer separates the work of drawing a frame from the work of showing it. This elegant system ensures that your eyes always see a complete, finalized picture. It is the invisible force behind the fluid motion of modern video games and smooth desktop interfaces.