Table 1. Descriptive statistics.
| Variable | Mean | SD | Minimum | Maximum |
|---|---|---|---|---|
| preSVFc | 23.9 | 14.54 | 0 | 52.5 |
| postSVFc | 5.23 | 8.77 | 0 | 29 |
| dSVFc | 18.67 | 13.25 | −1 | 44.5 |
| preVFc | 31.63 | 24.33 | 0 | 89.5 |
| postVFc | 10.37 | 16.85 | 0 | 54 |
| dVFc | 21.27 | 19.3 | −17.5 | 54.5 |
| preFRD1c | 1.37 | 0.88 | 0 | 2.3 |
| postFRD1c | 6.47 | 1.37 | 3.28 | 8.36 |
| dFRD1c | 4.82 | 1.51 | 1.84 | 7.5 |
| preLLLBc | 16.36 | 3.17 | 10.73 | 20.5 |
| postLLLBc | 18.68 | 2.45 | 16.2 | 22.52 |
| dLLLBc | 2.86 | 2.47 | 0 | 8.59 |
| preLLFc | 7.64 | 1.87 | 4.79 | 10.62 |
| postLLFc | 11.85 | 2.66 | 8 | 17.77 |
| dLLFc | 4.35 | 1.58 | 2.47 | 7.15 |
| preIDX | 50.47 | 14.07 | 16 | 73 |
| postIDX | 86.8 | 8.25 | 69 | 96 |
| dIDX | 36.13 | 15.66 | 10 | 61 |
Abbreviations: SD, standard deviation; Pre, pre-surgical measurement; Post, post-surgical measurement; d, postoperative change (difference); c, combined result of both eyes; IDX, functional index score; SVF, number of points missing in superior visual field; VF, number of points missing in ‘superior plus elsewhere' visual field; FRD1, distance in mm from corneal reflex to upper skin fold; LLB, distance in mm from lowest brow hair to lower limbus; LLF, distance mm from centre of lower lid to upper skin fold.