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The effect of head position on stereoacuity

1 January 2004


Vision plays an important role in the task of hitting a baseball. Stereoacuity is an essential visual skill for batting. We asked the question: is stereoacuity affected by a batter's head position? The Howard-Dolman apparatus was used to determine a threshold of stereoacuity. The stereoacuity of thirty subjects was tested in four different head positions: primary position (eyes facing straight ahead with no head turn), head turn (still seeing with both eyes), head tilt (habitual batting stance), and finally monocular viewing. Our results indicate no significant changes in stereoacuity were found between primary position, head tum, and head tilt. There were significant differences when comparing the monocular head position to primary position, head tum, and head tilt.


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