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

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;