Overview

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).

Eligibility

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;
4. Pregnant and lactating women;