Table 3.

Predicted Globe Rotation after Surgical Recession

Recession (mm)	MR Globe Rotation (°)	LR Globe Rotation (°)	MR v LR % Effect
1.0	5.3	4.0	132%
2.0	5.3	4.0	132%
3.0	5.4	4.0	134%
4.0	5.5	4.0	136%
5.0	5.6	4.0	138%
6.0	5.6	4.0	138%

This table assumes that the globe rotates by an angle determined by the arc change on the ocular surface produced by the recession. Because the medial rectus (MR) insertion is closer to the eccentric rotational axis, each mm change in MR position rotates a 24-mm diameter globe more than 5°, compared with only 4° for each mm change in lateral rectus (LR) position. The differential effect increases because with larger recessions the MR insertion approaches the globe’s axis of rotation, further shortening its lever arm.