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Anterior segment optical coherence tomography

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https://www.readbyqxmd.com/read/28291960/trabeculectomy-with-ologen-versus-mitomycin-c-in-juvenile-open-angle-glaucoma-a-1-year-study
#1
Fathi El-Sayyad, Heba Magdy Ahmed El-Saied, Mohamad Amr Salah Eddin Abdelhakim
BACKGROUND: We assessed bleb morphology and the intraocular pressure (IOP)-lowering effect of trabeculectomy with ologen compared to mitomycin C (MMC) in juvenile open-angle glaucoma (JOAG). METHODS: This is a prospective interventional comparative study conducted on 40 eyes (20 patients) with medically uncontrolled JOAG, randomly operating one eye for trabeculectomy with ologen (group A: 20 eyes) and the other with MMC (group B: 20 eyes). IOP measurement, SITA standard perimetry, and spectral domain optical coherence tomography (OCT) for retinal nerve fiber layer (RNFL) thickness were all done pre- and postoperatively...
March 15, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28291202/-comparative-analysis-of-the-value-of-information-provided-by-anterior-segment-optical-coherence-tomography-and-confocal-laser-scanning-microscopy-for-identifying-the-palisades-of-vogt-in-normal-limbus
#2
N P Pashtaev, N A Pozdeeva, A A Voskresenskaya, B V Gagloev, A A Shipunov
AIM: to conduct a comparative analysis of the value of information provided by anterior segment optical coherence tomography (AS-OCT) and in vivo confocal laser scanning microscopy (CLSM) for identifying the palisades of Vogt (POV) in normal limbus. MATERIAL AND METHODS: POV were studied in 15 healthy participants (30 eyes) without any anterior segment disease. Two examination methods were used: AS-OCT En Face imaging (RTVue XR Avanti, 3D Cornea protocol) and CLSM (HRT3)...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28282311/anterior-segment-optical-coherence-tomography-as-oct-in-the-management-of-dry-eye
#3
Koray Gumus, Stephen C Pflugfelder
No abstract text is available yet for this article.
2017: International Ophthalmology Clinics
https://www.readbyqxmd.com/read/28271013/ultrahigh-resolution-oct-imaging-of-the-human-cornea
#4
René M Werkmeister, Sabina Sapeta, Doreen Schmidl, Gerhard Garhöfer, Gerald Schmidinger, Valentin Aranha Dos Santos, Gerold C Aschinger, Isabella Baumgartner, Niklas Pircher, Florian Schwarzhans, Anca Pantalon, Harminder Dua, Leopold Schmetterer
We present imaging of corneal pathologies using optical coherence tomography (OCT) with high resolution. To this end, an ultrahigh-resolution spectral domain OCT (UHR-OCT) system based on a broad bandwidth Ti:sapphire laser is employed. With a central wavelength of 800 nm, the imaging device allows to acquire OCT data at the central, paracentral and peripheral cornea as well as the limbal region with 1.2 µm x 20 µm (axial x lateral) resolution at a rate of 140 000 A-scans/s. Structures of the anterior segment of the eye, not accessible with commercial OCT systems, are visualized...
February 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28270445/anterior-segment-optical-coherence-tomography-to-look-for-kayser-fleischer-rings
#5
REVIEW
Mittanamalli S Sridhar, Roberto Pineda
Ophthalmologists usually use slit lamp biomicroscopy to look for Kayser-Fleischer rings in Wilson's disease; anterior segment optical coherence tomography is a new alternative to identify the characteristic hyper-reflective layer in the deep corneal periphery at the level of Descemet's membrane. This method allows non-ophthalmologists to look for and to quantify Kayser-Fleischer rings.
March 7, 2017: Practical Neurology
https://www.readbyqxmd.com/read/28268561/automatic-anterior-chamber-angle-structure-segmentation-in-as-oct-image-based-on-label-transfer
#6
Huazhu Fu, Yanwu Xu, Damon Wing Kee Wong, Jiang Liu, Mani Baskaran, Shamira A Perera, Tin Aung
The anterior chamber angle (ACA) plays an important role for diagnosis and treatment of angle-closure glaucoma. Anterior Segment Optical Coherence Tomography (AS-OCT) imaging is qualitative and quantitative assessment for the ACA structure. In this paper, we propose a novel fully automatic segmentation method for anterior chamber angle structure in AS-OCT. In our method, the initial labels are obtained by using label transfer from the AS-OCT reference dataset. Then, these labels are refined and utilized as the landmarks to support the structure segmentation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264219/diagnosis-of-an-invisible-iris-cyst-using-autorefractometry-and-anterior-segment-optical-coherence-tomography
#7
T M Müller, P August, M Jesse, A P Lange
No abstract text is available yet for this article.
March 6, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28263262/anterior-segment-optical-coherence-tomography-for-targeted-transconjunctival-suture-placement-in-overfiltering-trabeculectomy-blebs
#8
Morgan Heisler, Whitney L Quong, Sieun Lee, Sherry Han, Mirza F Beg, Marinko V Sarunic, Paul J Mackenzie
PURPOSE: To demonstrate the utility of swept-source anterior segment optical coherence tomography (SS-AS-OCT) in guiding placement of transconjunctival sutures in hypotonous patients after a trabeculectomy. PATIENTS AND METHODS: This is a longitudinal case series of 10 eyes from 10 patients who required transconjunctival sutures after a trabeculectomy. SS-AS-OCT was used to aid in the placement of the sutures to improve the function of the overfiltering bleb. RESULTS: SS-AS-OCT reliably identified localized areas of overfiltering, allowing for targeted suture placement in 8 eyes...
March 3, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28261495/keraring-intrastromal-segment-depth-measured-by-spectral-domain-optical-coherence-tomography-in-eyes-with-keratoconus
#9
Ugo de Sanctis, Carlo Lavia, Marco Nassisi, Savino D'Amelio
Purpose. To evaluate agreement between measured and intended distance of Keraring (Mediphacos, Belo Horizonte, Brazil) intracorneal ring segments from the anterior and posterior corneal surfaces. Methods. Twenty-six Keraring ICRS implanted in 24 keratoconic eyes were examined. The distance from the Keraring apex to the anterior corneal surface and the distance from the inner and the outer corners to the posterior corneal surface were measured 3 months postoperatively using spectral-domain optical coherence tomography...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28237425/aqueous-angiography-in-living-nonhuman-primates-shows-segmental-pulsatile-and-dynamic-angiographic-aqueous-humor-outflow
#10
Alex S Huang, Meng Li, Diya Yang, Huaizhou Wang, Ningli Wang, Robert N Weinreb
PURPOSE: To evaluate the feasibility of safely performing aqueous angiography in intact eyes of living nonhuman primates (NHPs) for evaluating aqueous humor outflow and segmental patterns. DESIGN: Cross-sectional, observational study. SUBJECTS: Six nonhuman primates. METHODS: Aqueous angiography was performed in 6 nonhuman primates. After anesthesia, an anterior chamber (AC) maintainer was placed through a temporal 1-mm side-port wound...
February 22, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28226738/automatic-anterior-chamber-angle-structure-segmentation-in-as-oct-image-based-on-label-transfer
#11
Huazhu Fu, Yanwu Xu, Damon Wing Kee Wong, Jiang Liu, Mani Baskaran, Shamira A Perera, Tin Aung, Huazhu Fu, Yanwu Xu, Damon Wing Kee Wong, Jiang Liu, Mani Baskaran, Shamira A Perera, Tin Aung, Mani Baskaran, Tin Aung, Huazhu Fu, Yanwu Xu, Damon Wing Kee Wong, Jiang Liu, Shamira A Perera
The anterior chamber angle (ACA) plays an important role for diagnosis and treatment of angle-closure glaucoma. Anterior Segment Optical Coherence Tomography (AS-OCT) imaging is qualitative and quantitative assessment for the ACA structure. In this paper, we propose a novel fully automatic segmentation method for anterior chamber angle structure in AS-OCT. In our method, the initial labels are obtained by using label transfer from the AS-OCT reference dataset. Then, these labels are refined and utilized as the landmarks to support the structure segmentation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28221330/comparison-of-anterior-segment-optical-coherence-tomography-bleb-grading-moorfields-bleb-grading-system-and-intraocular-pressure-after-trabeculectomy
#12
Joanne C Wen, Sandra S Stinnett, Sanjay Asrani
PURPOSE: To compare a novel anterior segment optical coherence tomography (AS-OCT) bleb grading system with a clinical bleb grading system and both with intraocular pressure (IOP) following trabeculectomy surgery. MATERIALS AND METHODS: A novel AS-OCT grading system based on bleb size and internal reflectivity was developed. An imaging center was tasked with masked grading of AS-OCT images acquired by multiple surgical sites at postoperative week (POW) 2, postoperative month (POM) 4, 6, and 12, respectively...
February 17, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28210174/anterior-segment-optical-coherence-tomography-changes-with-introduction-and-discontinuation-of-tamsulosin
#13
Abdullah Al-Kharashi, Amir A Azimzadeh, Jerry Leung, Sidney Radomski, Lenny Radomski, Wai-Ching Lam
PURPOSE: The aim of this study was to quantify changes and reversibility in pupil dilation and iris dilator muscle region thickness associated with introduction and subsequent discontinuation of tamsulosin in patients naïve to this drug with the aid of an anterior OCT system. METHODS: The study was carried out on 7 patients (14 eyes) naïve to tamsulosin and with benign prostatic hypertrophy (BHP). Measurements taken by Vistante OCT were done pre- and post-dilation of the following: pupil size, iris dilator muscle region (DMR) thickness, sphincter muscle region (SMR) thickness, and anterior chamber depth...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28203200/late-onset-inadvertent-bleb-formation-following-pars-plana-m3-molteno-implant-tube-obstruction
#14
Anmar M Abdul-Rahman, Anthony Molteno
PURPOSE: To report a case of inadvertent bleb formation presenting 18 months after pars plana M3 Molteno implant tube obstruction in a patient with mixed mechanism glaucoma. MATERIALS AND METHODS: An 84-year-old Caucasian male with mixed mechanism glaucoma underwent slit-lamp examination, gonioscopy, colour anterior segment photography and anterior segment optical coherence tomography (AS-OCT). RESULTS: An inadvertent bleb developed 18 months after pars plana implant tube re-positioning with a 6/0 Vicryl tie ligature...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28197740/characteristics-of-successful-filtering-blebs-at-1%C3%A2-year-after-trabeculectomy-using-swept-source-three-dimensional-anterior-segment-optical-coherence-tomography
#15
Akiko Narita, Yuki Morizane, Tomoe Miyake, Jiro Seguchi, Tetsuya Baba, Fumio Shiraga
PURPOSE: To identify the cross-sectional characteristics of filtering blebs associated with intraocular pressure (IOP) control at 1 year after trabeculectomy with a square scleral flap and a fornix-based conjunctival flap. METHODS: A retrospective consecutive case series study was conducted. Eighty-four eyes of 79 patients who had undergone primary trabeculectomy were included. Surgical success was defined as IOP ≤15 mmHg and a >20% reduction in IOP without glaucoma medication and without additional glaucoma surgery at 1 year after trabeculectomy...
February 14, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28196218/association-of-baseline-anterior-segment-parameters-with-the-development-of-incident-gonioscopic-angle-closure
#16
Monisha E Nongpiur, Inas F Aboobakar, Mani Baskaran, Arun Narayanaswamy, Lisandro M Sakata, Renyi Wu, Eray Atalay, David S Friedman, Tin Aung
Importance: Baseline anterior segment imaging parameters associated with incident gonioscopic angle closure, to our knowledge, are unknown. Objective: To identify baseline quantitative anterior segment optical coherence tomography parameters associated with the development of incident gonioscopic angle closure after 4 years among participants with gonioscopically open angles at baseline. Design, Setting, and Participants: Three hundred forty-two participants aged 50 years or older were recruited to participate in this prospective, community-based observational study...
March 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28192377/application-of-casia-ss-1000-optical-coherence-tomography-tear-meniscus-imaging-in-testing-the-efficacy-of-new-strip-meniscometry-in-dry-eye-diagnosis
#17
Megumi Shinzawa, Murat Dogru, Keiichi Miyasaka, Jun Shimazaki, Tetsuju Sekiryu
PURPOSE: To investigate the applicability of CASIA SS-1000 anterior-segment optical coherence tomography (AS-OCT) imaging parameters in testing the efficacy of the new strip meniscometry (SM) namely "Strip Meniscometry Tube" (SMTube) in the diagnosis of dry eyes. METHODS: Forty-three eyes of 22 patients (4 men and 18 women) with definite dry eye disease (DED) and 49 eyes of 28 normal controls (6 men and 22 women) were studied. All subjects underwent symptom questionnaires, SMTube, the Schirmer-1 test, tear film break-up time measurement, vital staining examinations, as well as tear meniscus height (TMH) and TM area (TMA) measurements using an AS-OCT system...
January 6, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28188019/qualitative-analysis-of-repaired-filtering-blebs-with-anterior-segment-optical-coherence-tomography
#18
M Cerdà-Ibáñez, V T Pérez-Torregrosa, A Olate-Pérez, I Almor Palacios, A Gargallo-Benedicto, V Osorio-Alayo, A Barreiro Rego, A Duch-Samper
OBJECTIVE: To provide a qualitative analysis of filtering blebs after being surgically repaired due to late blebs leaks. METHODS: Blebs were studied 6 months after surgical reparation using AS-OCT Triton (Topcon(®)). An analysis was made of the morphological pattern and internal structures of blebs, including the covering, in 10 patients. The images were obtained using OCTs at a wavelength of 1050nm. RESULTS: According to the Hirooka classification, three different patterns were found in the structure of blebs, which made it possible to correlate them with their functionality...
February 7, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28187469/-intraoperative-optical-coherence-tomography-an-overview-of-current-clinical-data-for-the-application-in-the-anterior-and-posterior-segments
#19
A J Augustin
Intraoperative optical coherence tomography (iOCT) represents another milestone in ocular imaging technologies. Now, for the first time, high resolution OCT images are available not only pre- or postoperatively, but also intraoperatively. In recent years, there have been significant advances in iOCT technology - from hand-held probes and mounted systems towards iOCT systems which are fully integrated into the surgical microscope and which provide seamless integration into the workflow. These systems offer high-resolution, intraoperative OCT scans in real-time and provide additional information on microstructures of the retina or the cornea...
February 10, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28169918/bilateral-blebs-secondary-to-spontaneous-scleral-perforations
#20
Ester Fernández López, Alexander Poon, Andrew Huhtanen, Richard Lindsay, Catherine Green
PURPOSE: To report an unusual case of bilateral spontaneous scleral perforations. METHODS: A 34-year-old woman presented with bilateral conjunctival blebs and decreased vision in both eyes. There was no history of ocular trauma or surgery and no previous ophthalmic or systemic conditions that may have contributed to the scleral perforations. RESULTS: Best-corrected visual acuity was 20/40 in both eyes and intraocular pressures were 6 mm Hg in the right and 5 mm Hg in the left...
February 6, 2017: Journal of Glaucoma
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