Original articleVisualization of Anterior Chamber Angle Dynamics Using Optical Coherence Tomography
Section snippets
Materials and Methods
The study was conducted in accordance with the ethical standards stated in the 1964 Declaration of Helsinki and approved by the Hong Kong Hospital Authority Kowloon West Cluster Clinical Research Ethics Committee. Informed consent was obtained from 3 Chinese patients, followed up in the Department of Ophthalmology, Caritas Medical Centre Hong Kong after explanation of the purpose and nature of the investigation. We imaged the anterior chamber angle using the OCT 3 unit Stratus OCT. The scanning
Case 1
A 74-year-old Chinese man had been followed up for the management of ocular hypertension. During a recent visit, dilated fundus examination was arranged. However, middilated pupils with intraocular pressures (IOPs) of 27 mmHg and 35 mmHg in the right and left eyes, respectively, were detected an hour after the application of a topical mydriatic agent. A presumptive diagnosis of impending angle-closure attack secondary to mydriasis was made. Optical coherence tomography was performed over both
Discussion
Although it is uncommon in Caucasians, PACG is a major form of glaucoma and a leading cause of glaucoma blindness in the East Asian population.5 An occludable angle, commonly defined as having <90° of the posterior trabecular meshwork seen under gonioscopy, is known to be associated with the development of angle-closure glaucoma (ACG) and acute angle-closure attack.6 Gonioscopy, particularly compression gonioscopy, is the gold standard for angle assessment, yet it may be limited in assessing
References (12)
- et al.
Clinical use of ultrasound biomicroscopy
Ophthalmology
(1991) - et al.
Acute primary angle closure. Configuration of the drainage angle in the first year after laser peripheral iridotomy
Ophthalmology
(2004) - et al.
Long-term success of argon laser peripheral iridoplasty in the management of plateau iris syndrome
Ophthalmology
(2004) - et al.
Neodymium:YAG laser iridotomy in the initial management of phacomorphic glaucoma
Ophthalmology
(1992) - et al.
Measurement of ultrasound biomicroscopy imagesintraobserver and interobserver reliability
Invest Ophthalmol Vis Sci
(1994) - et al.
Ultrasound biomicroscopy. II. Intraobserver and interobserver reproducibility of measurements
Acta Ophthalmol Scand
(1998)
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Anterior segment optical coherence tomography
2018, Progress in Retinal and Eye ResearchCitation Excerpt :Whereas early studies were done with custom-built systems, commercial OCT systems designed for retinal imaging were adapted for anterior segment imaging. As such approaches to image the anterior segment of the eye were already done with the Zeiss Stratus OCT (Carl Zeiss Meditec, Dublin, CA, USA) in the early 2000s (Feng et al., 2001; Kalev-Landoy et al., 2007; Leung et al., 2005; Nozaki et al., 2002). In 2001, the measurement of central corneal thickness using a commercially available TD OCT system was reported for the very first time (Bechmann et al., 2001).
Automated anterior segment OCT image analysis for Angle Closure Glaucoma mechanisms classification
2016, Computer Methods and Programs in BiomedicineCitation Excerpt :Therefore, it is important to classify these four mechanisms of ACG effectively, in order to not only provide different treatments for patients with different mechanisms, but also help the doctors tailor the best treatment for each mechanism accordingly. It has been demonstrated that these four mechanisms of ACG have different patterns of angle configurations with different anterior chamber (AC) parameters [7]. AS-OCT provides excellent repeatability and reproducibility for imaging the anterior segment of eyes.
Plateau iris secondary to iridociliary cysts
2015, Archivos de la Sociedad Espanola de OftalmologiaAnterior segment optical coherence tomography measurement after neodymium-yttrium-aluminum-garnet laser capsulotomy
2014, American Journal of OphthalmologyEvaluation of the anterior chamber angle in glaucoma: A report by the American Academy of Ophthalmology
2013, OphthalmologyCitation Excerpt :This study demonstrated significant differences in a wide range of parameters, including a smaller ACD, smaller ACA, and more extensive appositional angle closure, in eyes after acute PAC. Another report described OCT imaging of the anterior segment using a commercially available time-domain device typically used for posterior segment imaging.57 This study did not evaluate quantitative parameters of the anterior segment but described the use of this instrument in 3 patients and documented widening of the ACA after LPI and laser iridoplasty.
Manuscript no. 2004-22.
The authors have no proprietary interest in the development or marketing of any product mentioned in the article, and the study receives no financial support.