New Approach to the Analysis of Raw Data from the Ocular Response Analyzer

PURPOSE: The aim of this research was to present a new approach for the potential characteristics of the anterior eye, based on numerical analysis of the raw data from multiple measurements on 1 eye captured with use of the Ocular Response Analyzer (ORA). METHODS: The measurements were carried out 6 times on every eye, one by one, on 29 patients using the ORA. Dependencies between values of 6 applanation pressures P₁ and P₂ from 1 eye and the new proposed time-dependent parameters sm and smm, obtained from the raw data, were used to determine new characteristic features of the anterior eye. RESULTS: Obtained values for multiple applanation pressures P₁ and P₂ and their average value P_a from all measurements on 1 eye show strong linear dependencies with the new proposed time-dependent parameter smm. CONCLUSIONS: The new parameters based on slope coefficients a₁ and a₂, their difference Δa, and respective y-intercept values b₁, b₂, and Δb show some characteristic stability for a multiply measured eye and can be used for its characterization. These parameters can be used for differentiation of the eyes with higher accuracy than those obtained from a single measurement. They are likely related to some biomechanical properties of the anterior eye.