Accuracy in determining intraocular lens dioptric power assessed by interlaboratory tests

Accuracy of predicted refraction with multifocal intraocular lenses using two biometry measurement devices and multiple intraocular lens power calculation formulas

“…28 We believe that our postoperative refractive results were mainly achieved thanks to our careful preoperative patient screening and highly accurate biometry. It should be noted that a MedAE of 0.15-0.21D is below the accepted manufacturer's error tolerance, 29 suggesting that more accurate multifocal IOL labelling may also influence these results.…”

Determination of Personalized IOL-Constants for the Haigis Formula under Consideration of Measurement Precision

“…The statistical uncertainty for the assessment of the final refraction F is assumed to be σ F = 0.2 m −1 . In accordance with the principles of modern quality assurance, the tolerance interval for the IOL power should be 6 standard deviations [ 19 ]. The width of the Gaussian noise σ D for IOL-power D is thus set to 1/6 th of the total tolerance interval defined by the International Organization for Standardization (ISO) [ 20 ] which depends on the absolute value of D ( Table 1 ).…”

Genauigkeitsgrenzen bei der IOL-Berechnung: Aktueller Stand

“…3 mit eingezeichnet. Die Toleranzen basieren auf einem Ringversuch, bei dem die selben IOL von verschiedenen Herstellern vermessen wurden [20]. Einige Hersteller behaupten, daß sie den jeweiligen Mittelwert exakt erreichen und die Tab.…”