Technical failure rates for biometry between swept-source and older-generation optical coherence methods: a review and meta-analysis

• Published in: BMC ophthalmology Vol. 23; no. 1; pp. 182 - 9
• Main Authors: Kanclerz, Piotr, Hecht, Idan, Tuuminen, Raimo
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 26-04-2023; BioMed Central; BMC
• Subjects: Analysis; Axial Length, Eye; Biometrics; Biometry; Biometry - methods; Cataract; Cataract Extraction; Cataracts; Cornea; Eye surgery; Humans; Interferometry; Intraocular lens calculation; Intraocular lenses; Lens, Crystalline; Low-coherence optical reflectometry; Medical research; Medicine, Experimental; Meta-analysis; Ophthalmology; Optical biometry; Partial coherence interferometry; Patients; Reproducibility of Results; Surgery; Swept-source optical coherence tomography; Tomography; Tomography, Optical Coherence - methods; Germany; Switzerland; Japan; Intraocular lens calculation; Cataract; Partial coherence interferometry; Swept-source optical coherence tomography; Optical biometry; Low-coherence optical reflectometry
• ISSN: 1471-2415; 1471-2415
• DOI: 10.1186/s12886-023-02926-0

Precise ocular measurements are fundamental for achieving excellent target refraction following both cataract surgery and refractive lens exchange. Biometry devices with swept-source optical coherence tomography (SS-OCT) employ longer wavelengths (1055-1300 nm) in order to have better penetration through opaque lenses than those with partial coherence interferometry (PCI) or low-coherence optical reflectometry (LCOR) methods. However, to date a pooled analysis showing the technical failure rate (TFR) between the methods has not been published. The aim of this study was to compare the TFR in SS-OCT and in PCI/LCOR biometry.
PubMed and Scopus were used to search the medical literature as of Feb 1, 2022. The following keywords were used in various combinations: optical biometry, partial coherence interferometry, low-coherence optical reflectometry, swept-source optical coherence tomography. Only clinical studies referring to patients undergoing routine cataract surgery, and employing at least two (PCI or LCOR vs. SS-OCT) optical methods for optical biometry in the same cohort of patients were included.
Fourteen studies were included in the final analysis, which presented results of 2,459 eyes of at least 1,853 patients. The overall TFR of all included studies was 5.47% (95% confidence interval [CI]: 3.66-8.08%; overall I
 = 91.49%). The TFR was significantly different among the three methods (p < 0.001): 15.72% for PCI (95% CI: 10.73-22.46%; I
 = 99.62%), 6.88% for LCOR (95% CI: 3.26-13.92%; I
 = 86.44%), and 1.51% for SS-OCT (95% CI: 0.94-2.41%; I
 = 24.64%). The pooled TFR for infrared methods (PCI and LCOR) was 11.12% (95% CI: 8.45-14.52%; I
 = 78.28%), and was also significantly different to that of SS-OCT: 1.51% (95% CI: 0.94-2.41%; I
 = 24.64%; p < 0.001).
A meta-analysis of the TFR of different biometry methods highlighted that SS-OCT biometry resulted in significantly decreased TFR compared to PCI/LCOR devices.