| 摘要 |
<p>The apparatus includes a fluid suspended, inner member, which has printed upon it a series of position bull's eyes, which are connected by a path printed on the inner member. The inner member is contained within a transparent, watertight outer housing, which has a sighting marking printed upon it. The device is attached to the user's head in a manner such that when the user moves his head, the outer member can move relative to the inner member. This allows the user to follow the path to visually track his correct head position through the posterior canalith repositioning maneuver sequence. Also attached to the user apparatus is an assistant apparatus which includes a hollow ball containing a liquid sufficient to form a small bubble which allows an assistant to follow a second path which corresponds to that seen by the user when he follows the user path.</p> |
