Study and patient characteristics
| Mean (SD) age at onset | 16.7 months (13.0); range 0–60 |
| Mean (SD) duration of X(T) | 40.9 months (19.9); range 13–117 |
| Mean (SD) age at surgery | 57.9 months (21.6); range 19–123 |
| Male : female ratio | 45% : 55% |
| Family history of strabismus | 36/72 (50%) |
| Non-surgical treatment for control prior to surgery? | 15/72 (21%)* |
| Indications for surgery | Appearance only 10%, functional only 17%, both appearance and functional 73% |
| Deteriorating distance angle between enrolment and pre-op in 37%, no change in 35%, improvement in 28% | |
| Deteriorating control between enrolment and pre-op in 58%, no change in 29%, improvement in 13% | |
| Mean (SD) interval between pre-operative assessment and surgery | 6.8 weeks(6.3); range 0–28 |
| Mean (SD) interval between surgery and initial post-operative assessment | 12.7 days (16.9); range 1–90 |
| Mean (SD) interval between surgery and last post-operative assessment | 21.4 months (10.5); range 6–46 |
*Nine glasses, five alternate occlusion, one both glasses and alternate occlusion.