REFU in dpt; N=16 669 | Bausch and lomb enVista | Alcon SA60AT | ||||||

IOL power steps STEPU | Labelling tolerances ISOU | IOL power steps STEPU | Labelling tolerances ISOU | |||||

Castrop | Haigis | Castrop | Haigis | Castrop | Haigis | Castrop | Haigis | |

Mean | 0.1201 | 0.1193 | 0.1866 | 0.1865 | 0.1224 | 0.1206 | 0.1936 | 0.1913 |

SD | 0.0162 | 0.0146 | 0.0217 | 0.0230 | 0.0103 | 0.0107 | 0.0308 | 0.0318 |

Median | 0.1177 | 0.1174 | 0.1879 | 0.1874 | 0.1216 | 0.1201 | 0.1944 | 0.1921 |

2.5% quantile | 0.1123 | 0.1117 | 0.1355 | 0.1324 | 0.1161 | 0.1123 | 0.1404 | 0.1347 |

97.5% quantile | 0.1259 | 0.1237 | 0.2420 | 0.2427 | 0.1272 | 0.1255 | 0.2505 | 0.2505 |

The REFU values are derived using a Monte Carlo simulation based on N=16 669 datapoints in the dataset. Data where (according to the Castrop or Haigis formula) no appropriate lens power steps were available were excluded. The table lists the mean, SD, median, and the lower and upper boundary of the 95% CI (2.5% and 97.5% quantiles). STEPU refers to the range from the lower boundary (STEPlo: IOLPQ−½ the step to the next lower lens power) to the upper boundary (STEPhi: IOLPQ+½ the next higher power step), and .REFU to half of this 68% CI interval is quoted as the ‘target parameter’ refraction uncertainty at the spectacle plane.

IOL, intraocular lens.