3-D TV uses two cameras to capture slightly different images for the left and right eyes, transmitting them to a 3-D TV that displays the images separately, creating a 3D effect when viewed with special glasses. Major technologies include shutter glasses, polarized filters, and autostereoscopic displays that don't require glasses. While providing an immersive viewing experience, 3-D TV also faces challenges such as higher costs and potential health issues from viewing.