Correlation of Scheimpflug and Ocular Coherence Tomography Relational Thickness Metrics in Refractive Surgery Patients
Narrative Responses:
Purpose
To evaluate the correlation between Scheimpflug (Pentacam HR, Oculus Inc.) Ambrósio Relational Thickness (ARTMax) and Spectral-Domain Ocular Coherence Tomography (SD-OCT, Optovue, Inc.) superior-inferior (S-I) and superonasal-inferotemporal (SN-IT) values.
Methods
Retrospective, consecutive series of 182 eyes from 91 patients presenting for refractive surgical evaluation with suspicious screening parameters (ectasia risk score = 3) with Scheimpflug and SD-OCT. The SD-OCT SI and SN-IT values were averaged together and then correlated with ARTMax score using Pearson’s Correlation Coefficient (r).
Results
The Pearson’s Correlation Coefficient (r = -0.12) indicated a poor correlation between the technologies.
Conclusion
The Pentacam HR ART Max and SD-OCT indices were poorly correlated in patients with suspicious screening parameters, suggesting that these two screening metrics are not analogous or interchangeable. Relative superiority could not be determined from this study.