peripheral iridotomy for primary angle closure suspect eyes using anterior segment optical coherence tomography. Purpose: To describe anterior segment optical coherence tomography (AS-OCT) parameters in phacomorphic angle closure eyes, mature cataract eyes, and their fellow eyes, and identify those parameters that could be used to differentiate phacomorphic angle closure eyes from those with mature cataract and no phacomorphic angle closure. In this paper, we … The ACA can be viewed clearly through Anterior Segment Optical Coherence Tomography (AS-OCT… Angle closure glaucoma is a major cause of blindness worldwide, with a particularly high prevalence in certain populations. Anterior segment optical coherence tomography (AS-OCT) is by contrast a non-contact and non-invasive technology for cross-sectional viewing of the anterior segment structures (Radhakrishnan et al., 2005) such as the iris and the ACA.This is shown in Fig. Abstract—Angle-closure glaucoma is a major cause of irre-versible visual impairment and can be identified by measuring the anterior chamber angle (ACA) of the eye. Porporato N, Baskaran M, Aung T. Clin Exp Ophthalmol, 46(2):147-157, 28 Dec 2017 Cited by: 4 articles | PMID: 29193702. Review 1 (a). Automated anterior segment OCT image analysis for Angle Closure Glaucoma mechanisms classification. Although being a more objective tool for assessment and follow-up of angle closure, reliability studies have reported a moderate diagnostic performance for anterior segment optical coherence tomography (OCT) technologies when comparing with gonioscopy as the reference standard. A comparison between anterior segment OCT & Ultrasound Biomicroscopy in angle closure P.A.Good, 1 R Siddiqi Birmingham and Midland Eye Centre, Birmingham U.K. Purpose. Author information: (1)School of Computer Engineering, Nanyang Technological University (NTU), 639798 Singapore, Singapore. The ACAs of each quadrant were evaluated by gonioscopy, classified by the Scheie grading system, and assigned into one of the three grades: small angle (SA), moderate angle (MA), and large angle (LA). One study found that the sensitivity and specificity rate of anterior segment OCT angle assessment vs. traditional gonioscopy ranged from 85% to 90% respectively. : A deep learning system for automated angle-closure detection in anterior segment optical coherence tomography images. The ACA can be viewed clearly through anterior segment optical coherence tomography (AS-OCT), but the imaging characteristics and the shapes and l … We found good evidence regarding the diagnostic accuracy of the AS‐OCT in detecting angle closure. Measurement of Anterior Chamber A ngle with Optical Coherence Tomography 225 2.1 Image acquisition In a retrospective observational study, the anterior chamber angle was measured using anterior segment images of OCT in 130 eyes of 72 patients. Anterior Segment Optical Coherence Tomography: Is There a Clinical Role in the Management of Primary Angle Closure Disease? PLateau Iris is a relatively uncommon form of primary angle closure glaucoma seen more often in younger adults than pupillary block angle-closure glaucoma. The ACA can be viewed clearly through Anterior Segment Optical Coherence Tomography (AS-OCT… The introduction of anterior-segment optical-coherence tomography (AS-OCT) has led to improved assessments of the anatomy of the iridocorneal-angle and diagnoses of several mechanisms of angle closure which often result in raised intraocular pressure (IOP). Anterior Segment Optical Coherence Tomography (AS-OCT) imaging provides a fast and contactless way to discriminate angle closure from open angle. Objective: To propose a novel non-invasive method for screening patients at risk of angle closure and thus the need for laser peripheral iridotomy using anterior segment OCT imaging. AS-OCT offers several advantages in comparison with the current reference standard, the gonioscopy, for angle assessment. Background/aims. Role of anterior segment optical coherence tomography in angle-closure disease: a review. Configuration of the drainage angle, intra-ocular pressure, and optic disc cupping in subjects with chronic angle-closure glaucoma. Figs. gonioscopic angle closure. Anterior segment optical coherence tomography (AS-OCT) is a non-contact imaging technique that produces high-resolution images and quantitative measurements of the anterior segment and its anatomical structures. Previous computational diagnostic techniques address this screening problem by extracting specific clinical measurements or handcrafted visual features from the images for classification. AS-OCT offers several advantages in comparison with the current reference standard, the gonios-copy, for angle assessment. Clinical application of anterior segment optical coherence tomography for angle-closure related disease Shan Lin 1, Jehn-Yu Huang 2 1 Department of Ophthalmology, University of CaliforniaeSan Francisco, San Francisco, CA, USA 2 Department of Ophthalmology, National University Hospital, Taiwan J. Glaucoma 2020 Jan 01;29(1)60-66, ME Nongpiur, TA Tun, T Aung From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. 203, 37–45 (2019) CrossRef Google Scholar Anterior Chamber and Angle A non-contact method to help identify patients at risk of angle closure glaucoma ChamberView — A patented 15.5 mm wide view of the entire anterior chamber with objective tools for measuring anterior segment ocular structures. Our system learns a discriminative representation from training data that captures subtle visual cues not modeled Background: To measure the anterior and posterior segment structural features of acute primary angle-closure (APAC) eyes. In this paper, an automated system based on deep learning is presented for angle-closure detection in AS-OCT images. Ocular Coherence Tomography of the anterior segment (ASOCT) has become a useful tool in the evaluation and biometric analysis of t he anterior segment in angle closure. AS‐OCT provides a quick, user‐friendly and objective non‐contact method of assessing the anterior segment and angle that is well tolerated by the patient and correlates well with the information provided by gonioscopy. 2019;97:e57-e63. 1 (b) and (c) demonstrate an ACA with open angle, occudable (appositional- and synechial-) angle-closure, respectively. Abstract: Irreversible visual impairment is often caused by primary angle-closure glaucoma, which could be detected via anterior segment optical coherence tomography (AS-OCT). To quantitatively assess anterior chamber angle (ACA) structure by anterior segment optical coherence tomography (AS-OCT) and develop a model to evaluate angle width as defined by gonioscopy. Acta Ophthalmol. PURPOSE The purpose of this study is to compare anterior segment-optical coherence tomography (AS-OCT) parameters in phacomorphic angle closure and acute primary angle closure (APAC) eyes. Aung T, Lim MC, Chan YH, et al. tures of the anterior chamber angle (ACA) may cause an elevated intraocular pressure and gradually lead to glaucomatous optic neuropathy and eventually to visual impairment and blindness. Anterior segment optical coherence tomography (AS-OCT) technology has become a popular tool for assessment of angle closure in clinical settings. Methods: A total of 36 subjects with unilateral APAC were recruited in this study. All subjects underwent an ophthalmic examination including visual acuity, slit-lamp biomicroscopy, Review Role of anterior segment optical coherence tomography in angle-closure disease: a review Natalia Porporato MD,1 Mani Baskaran DNB PhD1,2 and Tin Aung FRCS(Ed) PhD1,2,3 1Singapore Eye Research Institute, Singapore National Eye Centre, 2Duke-NUS Graduate Medical School, and 3Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore This disease has a familial tendency and is associated with increasing age and hyperopia. Documenting those changes of ocular biological parameters may be important as it has implications as to find which dynamic configuration effects the pathogenesis of angle closure most. 11. Meaning Anterior segment optical coherence tomography imaging parameters may be associated with the development of future incident gonioscopic angle closure. Niwas SI(1), Lin W(2), Bai X(3), Kwoh CK(4), Jay Kuo CC(5), Sng CC(6), Aquino MC(7), Chew PT(8). A major cause of irreversible visual impairment is angle-closure glaucoma, which can be screened through imagery from Anterior Segment Optical Coherence Tomography (AS-OCT). Angle-closure glaucoma is a major cause of irreversible visual impairment and can be identified by measuring the anterior chamber angle (ACA) of the eye. Angles less than 15° are considered “at risk” for angle closure. J. Ophthalmol. Abstract—Angle-closure glaucoma is a major cause of irre-versible visual impairment and can be identified by measuring the anterior chamber angle (ACA) of the eye. Ophthalmology. Anterior segment optical coherence tomography images illustrate the different parameters that were measured in this study for all subtypes of angle-closure and normal control eyes. Apart from being a Abstract: Angle-closure glaucoma is a major cause of irreversible visual impairment and can be identified by measuring the anterior chamber angle (ACA) of the eye. METHODS In this cross-sectional case series, a total of 134 patients with phacomorphic angle closure (28 eyes) or APAC (54 eyes), as well as normal control subjects (52 eyes), were enrolled. Anterior segment optical coherence tomography (AS-OCT) technology has become a popular tool for assessment of angle closure in clinical settings. In this paper, an automated system based on deep learning is presented for angle-closure detection in AS-OCT images. There has been rapid development of OCT technology over the past 2 decades, with the transition from time-domain to Fourier-domain OCT devices. Irreversible visual impairment is often caused by primary angle-closure glaucoma, which could be detected via anterior segment optical coherence tomography (AS-OCT). J. Glaucoma 2019 Sep 05;[EPub Ahead of Print], M Nongpiur, TA Tun, T Aung From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. AGE Challenge: Angle Closure Glaucoma Evaluation in Anterior Segment Optical Coherence T omography Huazhu Fu b,1, ∗ , Fei Li a,1, ∗ , Xu Sun c,1 , Xingxing Cao c,1 , Jingan Liao d,1 , Jos ´ Fu, H., Baskaran, M., et al. A major cause of irreversible visual impairment is angle-closure glaucoma, which can be screened through imagery from Anterior Segment Optical Coherence Tomography (AS-OCT). Anterior Segment Optical Coherence Tomography: Is There a Clinical Role in Management of Primary Angle Closure Disease? Am. Deep learning is anterior segment oct angle closure for angle-closure detection in AS-OCT images 36 subjects with chronic glaucoma. Structural features of acute primary angle-closure anterior segment oct angle closure, which could be detected anterior! 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