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New Approach to the Analysis of Raw Data from the Ocular Response Analyzer
Agnieszka Jóźwik1, Henryk Kasprzak1, Marta Kuczma2
1Department of Optics and Photonics, Wroclaw University of Technology, Wroclaw, Poland.
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 Pa 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.
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