| A single eyepoint for each display system is typical since binocular or stereoscopic display systems are very rarely used in flight simulators. |
| In order to determine visibility of an object, its location relative to the pilot's eyepoint must be specified. |
| Another source of registration error is viewing error, which is the error in the modeled eyepoint locations. |
| The height of the eyepoint depends on the focal length of the eyepiece and the position of its upper equivalent plane. |
