Table 3. The mean error of three methods and the percentages of predictive error within ±0.50D, ±1.00D and ±1.50D in the two groups.
| Parameter | Group A (43 eyes) (22 mm≤AL<26 mm) |
Group B (59 eyes) (AL≥26 mm) |
||||
| Immersion B-scan | IOLMaster | Contact A-scan | Immersion B-scan | IOLMaster | Contact A-scan | |
| Mean error ±SD(D) | -0.090±0.397 | -0.095±0.411 | -0.099±0.425 | -0.635±0.157 | -0.679±0.359 | -0.953±1.713 |
| Range (D) | -0.97 to +1.25 | -0.95 to +1.23 | -1.11to + 1.35 | -1.80 to +1.17 | -1.41 to +1.27 | -2.48 to +1.63 |
| Prediction error | ||||||
| Within±0.50 D, n (%) | 22 (51.2) | 25 (58.1) | 23 (53.5) | 30 (50.8) | 31 (52.5) | 14 (23.7) |
| Within±1.00 D, n (%) | 36 (83.7) | 38 (88.4) | 36 (83.7) | 45 (76.3) | 48 (81.4) | 30 (50.8) |
| Within±1.50 D, n (%) | 43 (100.0) | 43 (100.0) | 43 (100.0) | 57 (96.6) | 57 (96.6) | 50 (84.7) |
ME: Mean predictive error; SD: Standard deviation; Predictive error=Predicted postoperative error—postoperative spherical equivalent of the refractive error; AL: Axial length.