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Lees screen |
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screen, Lees An instrument similar to the Hess screen. It consists of two internally illuminated screens placed at right angles. One eye views one screen directly, the other views the second screen via a mirror; hence, the eyes are dissociated. When one eye fixates a point on one illuminated screen, its position as seen by the second eye is indicated with a wand on the second, non-illuminated screen. When this is illuminated, the position of the wand relative to the screen markings indicates whether a muscle or set of muscles is paretic or not. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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