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J. V. D. QUEREAU, M.D.

AMA Arch Ophthalmol. 1955;53(6):807-810.

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DEFINITIONS

In European literature rotation of the eye around its visual axis is usually called rolling. Apparent rolling during rotation of the normal eye around an oblique axis in Listing's plane is called torsion. In American literature rotation around the visual axis is usually called torsion and apparent rolling during rotation of the normal eye around an oblique axis in Listing's plane is called false torsion. It would eliminate confusion if one or the other group would find acceptance.

In this paper the following definitions will be used:

1. Rolling—rotation of the eye around its visual axis.
   
2. Torsion (or false torsion)—apparent rolling when the normal eye rotates about an oblique axis in Listing's plane.
   

Author Affiliations
Reading, Pa.

From the Department of Ophthalmology, Reading Hospital.

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