Rights boundary: PrecisionIOL should not implement Barrett, Kane, Hill-RBF, EVO, PEARL-DGS, or other proprietary formulas unless rights are obtained. In practical terms: do not implement Barrett, Kane, Hill-RBF, EVO, PEARL-DGS, or similar proprietary methods without permission. This page is educational and links to official resources where appropriate.
What a formula evidence hub should do
- Explain why no single formula wins every eye.
- Separate routine eyes from short eyes, long eyes, post-refractive eyes, and unusual anterior segment anatomy.
- Make formula spread and outliers visible when transparent formulas are calculated.
- Direct surgeons to official proprietary calculators when needed.
- Document uncertainty instead of hiding it behind one number.
Formula-aware positioning
| Formula family | Role in evidence discussion | PrecisionIOL boundary |
|---|---|---|
| SRK/T, Hoffer Q, Holladay 1, Haigis | Transparent/reference formulas with long clinical use and useful behavior across biometric patterns. | Calculated in PrecisionIOL where implemented and verified. |
| Barrett, Kane, Hill-RBF, EVO, PEARL-DGS, Olsen and other newer systems | Important in published comparisons and real-world external verification. | Educational discussion and official link-outs only unless rights are obtained. |
| Post-refractive pathways | Essential for LASIK, PRK, RK, and complex corneal history. | Flag case status, document history, and link to official post-refractive calculators. |
| AI or new-generation formulas | Useful evidence category, especially when standard assumptions are stressed. | Describe evidence and limitations; do not reverse-engineer protected methods. |
Best product message
The differentiator is not "we calculate every formula." The safer and stronger message is: PrecisionIOL helps surgeons understand formula agreement, identify edge cases, document uncertainty, and know when external verification is required.
This protects the product while still capturing high-intent SEO around formula comparison, formula disagreement, long eyes, short eyes, and post-refractive planning.
Review transparent formula spread
Use PrecisionIOL for transparent formula comparison, risk flags, and documentation, then verify complex cases with official external calculators when needed.
Open Formula Guide