Evolution of a Novel Optical Coherence Tomography Based Index in Diagnosing Keratoconus

A Study on Evaluating the Consistency of CASIA2, Pentacam, and Corvis ST Measurement Parameters and the Diagnostic Efficacy of Early Keratoconus

Comparison of corneal topography based on oct OCT principle (CASIA2) with Pentacam and Scheimpflug-based biomechanical devices (Corvis ST) in screening and diagnosing keratoconus; and evaluation of the consistency with Pentacam in measuring corneal parameters (such as curvature and thickness).

Inclusion Criteria:

1. Best corrected visual acuity (BCVA) ≥ 20/20;
2. No other eye diseases except myopia and astigmatism;
3. The cornea was transparent, and there was no cloud or pannus;

Exclusion Criteria:

1. The presence of ocular diseases other than myopia and keratoconus;
2. Ocular trauma;
3. Previous ocular surgery; 4 Patients were required to stop wearing soft contact lenses for at least 2 weeks and rigid contact lenses for at least 4 weeks before examination; 6. Pregnant and lactating women;