Table 2.
Comparison of prediction errors for each formula using two devices.
| Arithmetic prediction error within (%) | Formula | Optical Biometer | P value | |
|---|---|---|---|---|
| ARGOS | IOLMaster 700 | |||
| Over entire AL range (n = 106) | ||||
| ±0.50 D | Barrett Universal II | 66.0 | 62.3 | 0.481 |
| Haigis | 68.9 | 68.9 | 1 | |
| Hoffer Q | 58.5 | 56.6 | 0.815 | |
| SRK/T | 63.2 | 62.3 | 1 | |
| ±1.00 D | Barrett Universal II | 92.5 | 91.5 | 1 |
| Haigis | 93.4 | 93.4 | 1 | |
| Hoffer Q | 92.5 | 88.7 | 0.289 | |
| SRK/T | 92.5 | 91.5 | 1 | |
| Medium AL group (n = 76) | ||||
| ±0.50 D | Barrett Universal II | 64.5 | 61.8 | 0.791 |
| Haigis | 67.1 | 71.1 | 0.607 | |
| Hoffer Q | 67.1 | 67.1 | 1 | |
| SRK/T | 61.8 | 68.4 | 0.277 | |
| ±1.00 D | Barrett Universal II | 92.1 | 90.8 | 1 |
| Haigis | 93.4 | 93.4 | 1 | |
| Hoffer Q | 93.4 | 93.4 | 1 | |
| SRK/T | 92.1 | 89.5 | 0.625 | |
| Long AL group (n = 30) | ||||
| ±0.50 D | Barrett Universal II | 70.0 | 63.3 | 0.625 |
| Haigis | 73.3 | 63.3 | 0.250 | |
| Hoffer Q | 36.7 | 30.0 | 0.625 | |
| SRK/T | 66.7 | 46.7 | 0.070 | |
| ±1.00 D | Barrett Universal II | 93.3 | 93.3 | 1 |
| Haigis | 93.3 | 93.3 | 1 | |
| Hoffer Q | 90.0 | 77.7 | 0.125 | |
| SRK/T | 93.3 | 96.7 | 1 | |