Corvis ST, Keratoconus, Pentacam, Scansys, Subclinical Keratoconus
Conditions
Brief summary
Comparison of the screening and diagnosis ability of the novel Scheimpflug-based tomography device (Scansys) with Pentacam and the Scheimpflug-based biomechanics device (Corvis ST) for keratoconus.
Interventions
OTHERPentacam, Corvis ST and Scansys
morphological and biomechanical parameters of corneal were obtain by Scansys, Pentacam and Corvis ST
Sponsors
Tianjin Eye Hospital
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Healthy volunteers
Yes
Inclusion criteria
* Best corrected visual acuity (BCVA) ≥ 20/20; * No other eye diseases except myopia and astigmatism; * The cornea was transparent, and there was no cloud or pannus;
Exclusion criteria
* The presence of ocular diseases other than myopia and keratoconus; * Ocular trauma; * Previous ocular surgery; * 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; * Pregnant and lactating women;
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| screening and diagnosis ability | one year | Calculate the cut-off values, sensitivity and specificity of parameters measured by Pentacam, Corvis ST and Scansys in diagnosing keratoconus. Use Receiver operating characteristic curves (ROC) to analyze the optimal parameters to distinguish between the three groups. |
Countries
China
Outcome results
None listed