| Parameter | Pre‐surgery | After first eye surgery | After second eye surgery | P | ||
|---|---|---|---|---|---|---|
| Pre‐surgery v first eye operation | Pre‐surgery v second eye operation | First v second eye operation | ||||
| Binocular habitual visual acuity (logMAR), mean (SD) | 0.32 (0.21) | 0.15 (0.17) | 0.07 (0.15) | < 0.001 | < 0.001 | < 0.001 |
| First operated eye | 0.51 (0.28) | 0.19 (0.21) | 0.14 (0.18) | < 0.001 | < 0.001 | 0.020 |
| Second operated eye | 0.40 (0.23) | 0.54 (0.27) | 0.19 (0.19) | < 0.001 | < 0.001 | < 0.001 |
| Binocular contrast sensitivity (log units), mean (SD) | 1.48 (0.22) | 1.58 (0.16) | 1.64 (0.13) | < 0.001 | < 0.001 | < 0.001 |
| First operated eye | 1.22 (0.33) | 1.48 (0.17) | 1.49 (0.20) | < 0.001 | < 0.001 | 0.78 |
| Second operated eye | 1.31 (0.26) | 1.22 (0.31) | 1.46 (0.20) | < 0.001 | < 0.001 | < 0.001 |
| Anisometropia (dioptre), mean (SD) | 1.38 (1.71) | 2.68 (2.94) | 1.12 (1.72) | < 0.001 | 0.26 | < 0.001 |
| Anisometropia ≥ 1.00 dioptre | 58/112 (52%) | 85/107 (79%) | 36/109 (33%) | < 0.001 | 0.009 | < 0.001 |
| Moderate stereopsis (140 seconds of arc) | 41 (35%) | 34 (29%) | 59 (50%) | 0.28 | 0.020 | < 0.001 |
| First operated eye parameters | ||||||
| Refractive error (vector length, dioptre), mean (SD) | 2.62 (2.28) | 1.08 (1.86) | 1.11 (1.23) | <0.001 | < 0.001 | 0.85 |
| Changed spectacle refraction (≥ 0.75 dioptre) | — | 46/110 (42%) | 15/110 (14%) | — | — | < 0.001 |
| Second operated eye parameters | ||||||
| Refractive error (vector length; dioptre), mean (SD) | 2.52 (1.87) | 2.65 (2.23) | 1.31 (1.65) | 0.35 | < 0.001 | < 0.001 |
| Changed spectacle refraction (≥ 0.75 dioptre) | — | 40/113 (35%) | 24/113 (21%) | — | — | 0.035 |
| Habitual distance spectacle correction | ||||||
| No spectacles | 48 (41%) | 84 (71%) | 96 (82%) | 0.13 | 0.010 | 0.10 |
| Single vision | 21 (18%) | 6 (5%) | 4 (3%) | — | — | — |
| Multifocal/bifocal | 47 (40%) | 26 (22%) | 17 (15%) | — | — | — |
| Contact lens | 2 (2%) | 2 (2%) | 0 (0%) | — | — | — |
logMAR = logarithm of the minimum angle of resolution; SD = standard deviation.
General linear models to account for inherent correlation of the repeated measures. Missing data: before first operation, auto‐refraction/first eye (five), auto‐refraction/second eye (three), contrast sensitivity/first eye (one); after first operation, auto‐refraction/first eye (seven), auto‐refraction/second eye (ten), bilateral habitual visual acuity (four), habitual visual acuity/first eye (four), habitual visual acuity/second eye (three), bilateral contrast sensitivity (four), contrast sensitivity/first eye (four), contrast sensitivity/first eye (four); after second eye: auto‐refraction/first eye (eight), auto‐refraction/second eye (seven), bilateral habitual visual acuity (two), habitual visual acuity/first eye (two), habitual visual acuity/second eye (three), habitual correction (one), bilateral contrast sensitivity (two), contrast sensitivity/first eye (two), contrast sensitivity/first eye (two).