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Corneal Tomography in a Commercially Available Optical Coherence Tomography Device and Comparison With a Rotating
Piotr Kanclerz1, Szymon Adam Radomski
1Department of Ophthalmology (P.K., S.A.R.), Hygeia Clinic, Gdańsk, Poland, and Helsinki Retina Research Group (P.K.), University of Helsinki, Helsinki, Finland.
Eye & Contact Lens
|January 5, 2024
Summary
Corneal tomography measurements using Revo and Pentacam AXL showed excellent correlation for keratometry and pachymetry, despite significant differences. However, corneal elevation and asphericity measurements showed weaker agreement between the two devices.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Medical Imaging
Background:
- Corneal tomography is crucial for refractive and cataract surgery planning.
- Accurate and reproducible measurements are essential for surgical outcomes.
- Comparing different imaging devices ensures consistency in clinical practice.
Purpose of the Study:
- To compare corneal tomography outcomes between an optical coherence tomography device (Revo) and a Scheimpflug camera (Pentacam AXL).
- To assess the agreement of stereometric parameters used in ophthalmic surgery.
- To evaluate the reliability of Revo and Pentacam AXL for corneal measurements.
Main Methods:
- Agreement analysis of stereometric parameters in healthy subjects.
- Utilized correlation coefficients, Bland-Altman method, and paired t-test for comparison.
- Analyzed data from 78 healthy participants' right eyes.
Main Results:
- Revo showed significantly higher anterior keratometry and lower corneal thickness than Pentacam AXL, with excellent correlation (r > 0.97).
- Maximal keratometry showed a larger difference but strong correlation (r = 0.871).
- Corneal elevation and asphericity measurements exhibited weak to moderate correlation (r < 0.317).
Conclusions:
- Revo and Pentacam AXL demonstrate excellent correlation for keratometric and pachymetric values, despite significant differences.
- Measurements of corneal surface elevation and asphericity show limited agreement between the two devices.
- Clinical application requires consideration of device-specific measurement differences.
