Evaluation Of A Fully Automatic All-In-One Optical Biometry
Published 2023 - 41st Congress of the ESCRS
Reference: PO0221 | Type: Free paper | DOI: 10.82333/41sm-2j05
Authors: Jinhai Huang* 1 , Yiran Wang 2 , Jinjin Yu 1 , Xingtao Zhou 1 , Giacomo Savini 3
1Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences,Shanghai,China;Shanghai Research Center of Ophthalmology and Optometry,Shanghai,China, 2Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences,Shanghai,China;Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University,Wenzhou,China, 3G.B. Bietti Foundation I.R.C.C.S.,Rome,Italy
Purpose
To assess agreement of measurements by a new optical low coherence reflectometry (OLCR) biometer (SW-9000, Suoer, Tianjin, China) and a spectral-domain optical coherence tomographer (SD-OCT)/Placido topographer (MS-39, CSO, Florence, Italy) in healthy subjects.
Setting
This study was conducted at the Eye and ENT Hospital of Fudan University.
Methods
A total of 66 right eyes from 66 healthy subjects were enrolled in this prospective study. Three consecutive measurements were randomly obtained with both devices by the same experienced operator to assess agreement. Bland–Altman plots and 95% limits of agreement (LoA) were used to verify the agreement between the devices. Results were presented as mean ± standard deviation (SD).
Results
The SD-OCT/Placido tomographer showed high agreement with OLCR biometer for all parameters included in this study. The mean differences of central corneal thickness (CCT), anterior chamber depth (ACD), aqueous depth (AQD), mean keratometry (Km) and corneal diameter (CD) were 2.21±2.67μm (P<0.001), -0.10±0.03mm (P<0.001), -0.10±0.04mm (P<0.001), -0.01± 0.22D (P=0.773) and 0.20±0.16 mm (P<0.001), respectively. This implies that the inter-device difference in Km was not statistically significant, while the differences in CCT, ACD, AQD, CD were statistically but not clinically significant. The 95% LoAs of CCT, ACD, AQD, Km and CD were -3.01 to 7.44μm, -0.16 to -0.05mm, -0.18 to -0.03mm, -0.45 to 0.43D, and -0.12 to 0.51mm.
Conclusions
For CCT, ACD, AQD, Km, and CD in healthy subjects, the new OLCR biometer has high agreement with SD-OCT/Placido tomographer and can be used interchangeably due to the narrow range of 95% LoAs.