Haigis and Haigis L Formula Constants Optimizer

Disclaimer: This tool is intended for research purposes only. Results should not be used for clinical decision-making without professional verification.

Note: The dataset should ideally include at least 40 observations for reliable analysis, although the tool will still run with fewer cases. The more cases you provide, the narrower the 95% CI for each coefficient and the greater the precision.

Upload your Excel file. Columns must be labeled exactly as follows:

• Axial Length: AxL
• ACD epithelium: ACDEpith
• SimK: SimK
• Implanted lens: ImplantedIOL
• Postoperative spherical equivalent: SEpostop

Select IOL type:

Optimized Constants (a0, a1, a2) with Statistical Analysis

Summary Statistics

Processed Data

Convergence Graphs

Histograms