Comparing the Performance of Stress-Strain Index Versions 1 and 2 in Normal and Keratoconus Patients.

ABSTRACT:

Purpose

The purpose of this study was to compare the performance of the Stress-Strain Index versions 1 and 2 (SSI and SSI2) in healthy patients and patients with keratoconus (KC).

Methods

Fifty-two healthy and 104 KC eyes were examined using Scheimpflug-based tomography and air-puff tonometry (Pentacam and Corvis). Correlations between both versions of SSI and age, thinnest pachymetry, and tomographic parameters were assessed. To discriminate KC eyes from healthy eyes, receiver operating characteristic curves were generated to calculate the area under the curve (AUC) for both versions of SSI and compared with a Delong test.

Results

Both versions of SSI showed statistical differences between the healthy group and the group of patients with KC (all P < 0.001). In the he

SUBMITTER: Lu NJ 

PROVIDER: S-EPMC11951061 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature