FPV goggles are glasses with built-in screens that you connect to the drone. They show the drone's perspective from the air directly in front of your eyes. Remember to match the aspect ratio of the glasses with the camera on the drone. FPV goggles with two screens should be able to change the IPD distance so that the screens have the right relationship to your pupils. FPV goggles are enclosing and cover the entire field of view.
