Agreement of anterior segment measurements between four diagnostic imaging devices in myopic patients

ABSTRACT

Purpose

To compare the inter-device agreement of anterior chamber depth (ACD), central corneal thickness (CCT), flat keratometry (K1), steep keratometry (K2), corneal astigmatism (ΔK), and white-to-white (WTW) measurements.

Methods

This is a retrospective study with 73 myopic patients (142 eyes). We extracted and compared anterior segment measurements (ACD, CCT, K1, K2, ΔK, and WTW) of four devices (OPD-Scan III, Pentacam HR, Lenstar LS 900, and Galilei G4), and performed pairwise agreement comparisons between them.

Results

Agreement analyses revealed that the most agreement occurred: in Pentacam HR and Galilei G4 for ACD measurements, in Pentacam HR and Lenstar LS 900 for CCT measurements, in OPD-Scan III and Galilei G4 for WTW measurements, in OPD-Scan III and Pentacam HR for K1 and K2 measurements, and OPD-Scan III and Galilei G4 for ΔK measurements.

Conclusion

OPD-Scan III is interchangeable with both Galilei G4 and Lenstar LS 900 for WTW measurements. OPD-Scan III and the Pentacam-HR are interchangeable in K1, K2, and ΔK measurements. OPD-Scan III and Lenstar LS 900, and OPD-Scan III and Galilei G4 are interchangeable in K1 and ΔK measurements, respectively.

KEYWORDS:

• Agreement
• anterior chamber depth
• anterior segment measurements
• central corneal thickness
• comparison
• device interchangeability
• keratometry
• white-to-white

Data availability statement

The data that support the findings of this study are available from the corresponding author, M Moshirfar, upon reasonable request.

Author contributions

Authors’ contributions: John Placide and Helio Neves da Silva made substantial contributions to the design and draft of the work, and interpretation of the data. Majid Moshirfar, Shannon McCabe, and Yasmyne Ronquillo made substantial contributions to the conception of the work and substantively revised it. All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this manuscript, take responsibility for the integrity of the work, and have given final approval to the version to be published.

Research Ethics: IRB, Patient consent

This study was approved by the Hoopes Vision Research at Hoopes Vision Ethics Committee and BRANY IRB (New York). This retrospective study using de-identified data has been approved by the Hoopes Vision Ethics Board and conforms with the Helsinki Declaration of 1964, as revised in 2013, concerning human and animal rights. The patients signed informed consent.

Declaration of interest

The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.

Reviewer disclosures

Peer reviewers on this manuscript have no relevant financial or other relationships to disclose.

Additional information

Funding

This study was funded by an unrestricted grant from Research to Prevent Blindness (RPB), 360 Lexington Avenue, 22nd Floor New York, NY 10017.