| 摘要 |
A measurement instrument and its associated method of use to record a pupil center position of a person's eye. The instrument has a chassis and a free swinging assembly that is pivotably attached to the chassis. The swinging assembly has alignment points that remain in a horizontal plane as the swinging assembly swings. The instrument is attached to a set of eyeglass that are worn on that person's head. While wearing the measuring instrument, a person is made to assume a natural head position for a specific activity. Once a natural head position is found, the swinging assembly is set into a locked position. The pupil center point can then be determined by observing the now locked alignment points from a predetermined vantage point.
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