Great Lakes Eye Care, Saint Joseph, Michigan, USA; Department of Neurology and Ophthalmology, Michigan State University, College of Osteopathic Medicine, East Lansing, Michigan, USA.
Great Lakes Eye Care, Saint Joseph, Michigan, USA.
J Cataract Refract Surg. 2019 Mar;45(3):284-292. doi: 10.1016/j.jcrs.2018.10.039.
To compare prediction accuracy with the axial length (AL) calculation method of the Lenstar biometer (traditional AL) and that of the ARGOS biometer (sum-of-segments AL).
Private practice clinic.
Comparative case series.
Mean absolute error (MAE).
Predictions were developed for nine formulas, grouping them into those derived with ultrasound (US) (SRK/T, Holladay 1 and 2, Hoffer Q, Haigis) and those derived with optical biometry (Barrett, OKULIX, Olsen from PhacoOptics, and Olsen from Lenstar). Formulas were ranked by MAE using sum-of-segments AL and traditional AL, in short eyes (traditional AL <22.0 mm), long eyes (traditional AL >26.0 mm), and all eyes.
The study comprised 1442 eyes (54 short eyes and 67 long eyes) of 1070 patients. The best-ranking formula for long eyes was Haigis using sum-of-segments AL. For short eyes and for all eyes, OKULIX using sum-of-segments AL was best. Using sum-of-segments AL instead of traditional AL, Holladay 2 improved the most; Olsen from PhacoOptics worsened the most.
Some biometers used traditional AL, and at least one used sum-of-segments AL. Formula accuracy varied depending on how various commercial biometers internally calculate AL. Using sum-of-segments AL instead of traditional AL improved predictions for formulas designed on US data (SRK/T, Holladay 1, Holladay 2, Hoffer Q, and Haigis), although it worsened the Barrett and Olsen formulas. OKULIX was generally improved with sum-of-segments AL. When ranking by MAE, OKULIX ranked first.
比较 Lenstar 生物测量仪的轴向长度（AL）计算方法（传统 AL）和 ARGOS 生物测量仪的 AL 计算方法（节段和法 AL）的预测准确性。
私人诊所。
比较病例系列。
平均绝对误差（MAE）。
使用超声（US）（SRK/T、Holladay 1 和 2、Hoffer Q、Haigis）和光学生物测量（Barrett、OKULIX、PhacoOptics 的 Olsen 和 Lenstar 的 Olsen）推导的 9 个公式进行预测。根据节段和法 AL 和传统 AL 将公式分为短眼（传统 AL <22.0mm）、长眼（传统 AL >26.0mm）和所有眼睛，使用 MAE 对公式进行排名。
本研究共纳入 1070 名患者的 1442 只眼（54 只短眼和 67 只长眼）。长眼的最佳排名公式是节段和法 AL 的 Haigis。对于短眼和所有眼睛，节段和法 AL 的 OKULIX 是最好的。使用节段和法 AL 代替传统 AL，Holladay 2 改善最大；PhacoOptics 的 Olsen 恶化最大。
一些生物测量仪使用传统 AL，至少有一个使用节段和法 AL。公式准确性取决于各种商业生物测量仪如何内部计算 AL。使用节段和法 AL 代替传统 AL 改善了基于 US 数据设计的公式（SRK/T、Holladay 1、Holladay 2、Hoffer Q 和 Haigis）的预测，尽管它恶化了 Barrett 和 Olsen 公式。OKULIX 通常使用节段和法 AL 得到改善。根据 MAE 排名，OKULIX 排名第一。
