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Anterior Ocular Biometrics Using Placido-scanning-slit System, Rotating Scheimpflug Tomography, and Swept-source Optical Coherence Tomography

Authors
 Soyoung Ryu  ;  Sook Hyun Yoon  ;  Ikhyun Jun  ;  Kyoung Yul Seo  ;  Eung Kweon Kim  ;  Tae-Im Kim 
Citation
 Korean Journal of Ophthalmology, Vol.36(3) : 264-273, 2022-06 
Journal Title
Korean Journal of Ophthalmology
ISSN
 1011-8942 
Issue Date
2022-06
MeSH
Biometry* / methods ; Cornea / diagnostic imaging ; Corneal Topography / methods ; Humans ; Prospective Studies ; Reproducibility of Results ; Tomography, Optical Coherence* / methods
Keywords
Anterior ; Anterior eye segment ; Placido-scanning-slit ; Scheimpflug camera ; Swept source optical coherence tomography
Abstract
Purpose: To compare anterior biometry measurements using placido-scanning-slit topography, rotating Scheimpflug tomography, and swept-source optical coherence tomography.

Methods: A retrospective review consisted of 80 eyes of 49 participants who underwent anterior chamber depth (ACD), central corneal thickness (CCT), and keratometry examination on the same day. We used placido-scanning-slit topography (ORBscan II), rotating Scheimpflug tomography (Pentacam HR), and swept-source optical coherence tomography (CASIA SS1000). The intraclass correlation coefficients and Bland-Altman plots were used to evaluate the agreement and differences between measurements.

Results: The mean ACD values were 2.88 ± 0.43, 2.82 ± 0.50, and 2.68 ± 0.44 mm; and the mean CCT values were 536.96 ± 31.19, 543.79 ± 31.04, and 561.41 ± 32.60 μm; and the mean keratometry (Km) were 43.81 ± 1.69, 43.81 ± 1.77, and 44.65 ± 1.95 diopters; as measured by CASIA SS-1000, Pentacam HR, and ORBscan II, respectively. Among the three devices, ACD was deepest to shallowest in the order of CASIA SS-1000, Pentacam HR, and ORBscan II (p < 0.05). The CCT was thickest to thinnest in the order of ORBscan II, Pentacam HR, and CASIA SS-1000 (p < 0.05). No significant differences in Km values were examined between CASIA SS-1000 and Pentacam HR, whereas ORBscan II overestimated Km with a statistically significant difference compared to the other two devices.

Conclusions: High level of agreement was found between CASIA SS-1000 and Pentacam HR for anterior parameters, including ACD, CCT, and Km, suggesting interchangeability. However, ORBscan II measurements differed considerably with the measurements obtained from the other two devices; therefore, it should not be used interchangeably. However, further studies with repeatability test should be considered in order to elucidate the reliability of each device.
Files in This Item:
T202203938.pdf Download
DOI
10.3341/kjo.2021.0120
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Eung Kweon(김응권) ORCID logo https://orcid.org/0000-0002-1453-8042
Kim, Tae-Im(김태임) ORCID logo https://orcid.org/0000-0001-6414-3842
Seo, Kyoung Yul(서경률) ORCID logo https://orcid.org/0000-0002-9855-1980
Jun, Ik Hyun(전익현) ORCID logo https://orcid.org/0000-0002-2160-1679
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/191491
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