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Anterior segment OCT
Published in Pablo Artal, Handbook of Visual Optics, 2017
In clinical practice, imaging of the AS has been traditionally carried out with slit-lamp biomicroscopy. However, AS imaging is currently a rapidly advancing field of ophthalmology and provides tools that supplement well-established modalities. Those modern techniques include ultrasound biomicroscopy (UBM), confocal microscopy, Scheimpflug imaging, and corneal topography (Wolffsohn and Peterson, 2006, Konstantopoulos et al., 2007, Wolffsohn and Davies, 2007, Guthoff and Stachs, 2011). Apart from instrumentation development, a tremendous effort has been made to implement image analysis techniques that allow obtaining quantitative information on the state of the cornea, anterior chamber, corneoscleral angle, and crystalline lens (Wolffsohn and Peterson, 2006, Heur and Dupps, 2009, Pinero, 2015). Consequently, application of new technologies for in vivo imaging significantly improves clinical procedures in ophthalmology.
Repeatability and reproducibility of anterior lens zonule length measurement using ArcScan insight 100 very high-frequency ultrasound
Published in Expert Review of Medical Devices, 2023
Zehui Zhu, Han Zou, Hongzhe Li, Xueer Wu, Yiyi Wang, Zhangliang Li, Yune Zhao
Previous in vivo studies on zonules mainly depended on ultrasound biomicroscopy (UBM). The UBM technique produces precise biometric measurements of the anterior ocular segments, including the structures behind the iris. During the UBM examination, subjects must be supine, which has the potential to influence the measurement results [8,9]. Insight 100 is a newly developed ultrasound device that works on the same principle as UBM but with a mechanically controlled transducer, which facilitates easier usage [6,10]. Subjects, in a sitting position, were examined through a disposable eyepiece, which helps to prevent cross-contamination (Figure 1). The alignment position and depth of focus can be set manually, thus enabling the acquisition of high-quality scans of the anterior lens zonule.
Agreement between anterior segment parameters obtained by a new ultrasound biomicroscopy and a swept-source fourier-domain anterior segment optical coherence tomography.
Published in Expert Review of Medical Devices, 2020
Xiuyuan Li, Pingjun Chang, Zhangliang Li, Shuyi Qian, Zehui Zhu, Qianwei Wang, Zhao Yun-E
The study assessed the agreement between the new ultrasound biomicroscopy and aswept-source fourier-domain anterior segment optical coherence tomography for the measurement of anterior segment parameters especially lens diameter in agroup of normal healthy eyes.