Table 3.
Postoperative simultaneous-prism-and-cover test (SPCT) at distance according to preoperative alignment stability—acquired esotropia only
| Simultaneous Prism and Cover Test at distance | Acquired esotropia | ||
|---|---|---|---|
| Preoperative alignment stability | |||
| Stable (N = 41) |
Uncertain (N = 41) |
Unstable (N = 17) |
|
| Six weeks postoperative | |||
| N with data | 29 | 26 | 13 |
| Angle size, in prism diopters | |||
| Median | 0 | 4 | 4 |
| 25th pctl, 75th pctl | 0, 6 | 0, 4 | 2, 6 |
| Range | 0 to 16 | 0 to 10 | 0 to 16 |
| Any heterotropia ≥10Δ | |||
| N (%) | 3 (10) | 2 (8) | 1 (8) |
| [95% CI] | [2 to 27] | [1 to 25] | [0 to 36] |
| Exotropia ≥10Δ | |||
| N (%) | 1 (3) | 1 (4) | 1 (8) |
| [95% CI] | [0 to 18] | [0 to 20] | [1 to 36] |
| Six months postoperative | |||
| N with data | 31 | 27 | 12 |
| Angle size, in prism diopters | |||
| Median | 6 | 4 | 3 |
| 25th pctl, 75th pctl | 0, 10 | 0, 6 | 0, 6 |
| Range | 0 to 20 | 0 to 25 | 0 to 18 |
| Any heterotropia ≥10Δ | |||
| N (%) | 8 (26) | 3 (11) | 2 (17) |
| [95% CI] | 12 to 45] | [2 to 29] | [2 to 48] |
| Exotropia ≥10Δ | |||
| N (%) | 3 (10) | 0 (0) | 1 (8) |
| [95% CI] | [2 to 26] | [0 to 13] | [0 to 38] |