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Correspondence |

Random Measurement Error in Assessing Compensatory Ocular Countertorsion

Satoshi Hasebe, MD, PhD; Ichiro Hamasaki, MD; Hiroshi Ohtsuki, MD, PhD
Arch Ophthalmol. 2003;121(12):1805. doi:10.1001/archopht.121.12.1805.
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We read with great interest the article by Jampel and Shi1 and were surprised by its Copernicus-like conclusion that compensatory ocular countertorsion for head tilt does not exist. These authors appear to have reproduced, with some modification of technique, their own prior studies on the subject.2,3

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Torsional eye positions at right head tilt angles of 0°, 10°, 20°, 30°, 40°, and 50°. Images were obtained in random order. An arbitrary iris pattern is shown by the arrows; the crosshairs show the x-y coordinate of the iris pattern that was obtained at a head tilt of 0°(a reference point). The centroid of the pupil is shown with a dot in the pupil in all images. The countertorsion is represented by the angle among the 3 points. The final amount of countertorsion seen in the 50° image was 5.2°.

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