Pursuing a new level of accuracy.
The Hill-RBF (Radial Basis Function) Calculator is an advanced, self-validating method for IOL power selection employing pattern recognition and sophisticated data interpolation. It has been optimized for use with the Haag-Streit Lenstar, utilizing optical biometry for all axial measurements and high-density autokeratometry. It is now integrated into the Lenstar EyeSuite biometry software.
- Go to the website: Hill-RBF Calculator
Radial basis function IOL power selection is applicable for short, normal, and long eyes. Based on artificial intelligence, this methodology is entirely data-driven and free of calculation bias. This approach also employs a validating boundary model, indicating when it is performing within a defined area of accuracy.
The fundamental advantage of pattern recognition in selecting an IOL power is achieved through the process of adaptive learning—the ability to learn tasks based solely on data, independent of what is previously known. Current methods limit possibilities to situations that are already understood. This method is also self-organizing, meaning that it can create its own organization or representation of data. Such an approach is well-suited to the complex, non-linear relationships that make up many aspects of the human eye.
Unlike static theoretical formulas, this approach will be an ongoing project and continuously updated as a “big data” exercise. The greater the number of surgical outcomes that are fit to the RBF model, the greater the overall depth of accuracy. In its present form, the Hill-RBF Calculator has been optimized for biconvex IOLs from +6.00 D to +30.00 D.
Hill-RBF Expanded Beta Version includes the following updates:
- It is now possible to enter your target spherical equivalent, like other popular vergence and ray tracing formulas.
- 8,974 cases have expanded the database for normal eyes. An out-of-bounds indication for this patient population will be less common.
- With the addition of more than 1,000 cases with a very short axial length, the range of in-bounds calculations for the high axial hyperope has been significantly increased.
- The range of in-bounds calculations for high to extreme axial myopia has also been significantly increased based on an extensive database of typical low-power IOLs. In-bounds calculations for the high to extreme axial myope will now include meniscus design IOLs and extend down to -5.00 D.
- Because the database for the expanded beta version of the RBF calculator has been increased from 3,445 to 12,419 eyes, the IOL power recommended by the same pre-operative measurements may be slightly different. This is the result of the artificial intelligence model being re-fit to a new database and is what we would expect to see.
