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Anterior segment optical coherence tomography

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https://www.readbyqxmd.com/read/28526283/combination-of-anterior-segment-optical-coherence-tomography-modalities-to-improve-accuracy-of-rectus-muscle-insertion-location
#1
Michael J Venincasa, Carla J Osigian, Kara M Cavuoto, Julia D Rossetto, Hilda Capo
No abstract text is available yet for this article.
May 16, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28524144/-new-approaches-to-the-treatment-of-keratoconjunctivitis-sicca
#2
T N Safonova, O V Gladkova, I A Novikov, V I Boev, A A Fedorov
A new method has been developed for the treatment of severe forms of keratoconjunctivitis sicca (KCS) that involves the use of an original cyclosporine A (CyA) saturated soft contact lens (SCL) together with preservative-free artificial tears therapy. AIM: to evaluate the effectiveness of the newly developed treatment for KCS based on the use of medical SCL saturated with 0.05% CyA. MATERIAL AND METHODS: The patients (43 men, 60 eyes) with severe KCS were divided into 2 groups...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28520627/posterior-scleral-melanocytosis-a-novel-fundus-finding-masquerading-as-a-choroidal-nevus
#3
Rosa Dolz-Marco, Dov B Sebrow, K Bailey Freund
PURPOSE: To report a case of "posterior scleral melanocytosis," a pigmented lesion of the posterior sclera that clinically resembles a flat choroidal nevus. METHODS: Case report of a patient with posterior scleral melanocytosis. Multimodal imaging, including swept source optical coherence tomography, was used to demonstrate the scleral location of the pigmented lesion and to distinguish its features from a typical choroidal nevus present in the same eye. RESULTS: An 86-year-old woman was seen for regular follow-up for neovascular age-related macular degeneration in her right eye and 2 pigmented lesions in her left eye, both presumed to be choroidal nevi...
May 16, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28520595/decreased-visual-acuity-by-an-irregular-corneal-posterior-surface-after-repeat-descemet-stripping-automated-endothelial-keratoplasty
#4
Hiroyuki Yazu, Takefumi Yamaguchi, Murat Dogru, Yoshiyuki Satake, Kazuo Tsubota, Jun Shimazaki
PURPOSE: To investigate the impact of higher-order aberrations (HOAs) on visual acuity after repeat Descemet stripping automated endothelial keratoplasty (DSAEK) in the same eyes. METHODS: This retrospective comparative case series includes 23 patients who underwent DSAEK twice in the same eyes (46 DSAEK in total). We evaluated the HOAs of the anterior and posterior corneal surfaces, and total cornea using the Fourier analysis data from anterior segment optical coherence tomography...
May 16, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28516453/dba-2j-mouse-model-for-experimental-glaucoma-pitfalls-and-problems
#5
Anita J Turner, Roshana Vander Wall, Vivek Gupta, Alex Klistorner, Stuart L Graham
PURPOSE: The DBA/2J mouse has been described as a model for congenital experimental glaucoma. It develops anterior segment anomalies with synechiae and pigment dispersion leading to raised intraocular pressure (IOP) and glaucomatous damage. However there are serious practical considerations when using this model in longitudinal studies. METHODS: We followed 118 mice from 12 - 48 weeks of age in a pharmaceutical trial. Here we report on the findings in control animals (n=37)...
May 18, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28499992/segmentation-and-quantification-for-angle-closure-glaucoma-assessment-in-anterior-segment-oct
#6
Huazhu Fu, Yanwu Xu, Stephen Lin, Xiaoqin Zhang, Damon Wing Kee Wong, Jiang Liu, Alejandro Frangi, Mani Baskaran, Tin Aung
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. The ACA can be viewed clearly through Anterior Segment Optical Coherence Tomography (AS-OCT), but the imaging characteristics and the shapes and locations of major ocular structures can vary significantly among different AS-OCT modalities, thus complicating image analysis. To address this problem, we propose a datadriven approach for automatic AS-OCT structure segmentation, measurement and screening...
May 10, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28494078/exclusion-of-traumatic-anterior-capsule-laceration-using-anterior-segment-optical-coherence-tomography
#7
Paul G Rainsbury, Aby Jacob
No abstract text is available yet for this article.
May 11, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28489805/first-experience-of-ndasek-with-heads-up-surgery-a-case-report
#8
Yasser Helmy Mohamed, Masafumi Uematsu, Daisuke Inoue, Takashi Kitaoka
PURPOSE: To report a case of non-Descemet Stripping Automated Endothelial Keratoplasty (nDSAEK) using heads-up surgery. CASE/INTERVENTION: The case was a 72-years-old man who had history of left eye blunt trauma since childhood. One year ago, the patient was diagnosed to have left posttraumatic bullous keratopathy. The patient underwent lt nDSAEK by using the heads-up three-dimensional (3D) system last July. The surgery was performed with a Rescan 700 surgical microscope (Carl Zeiss), which is integrated with intraoperative optical coherence tomography (iOCT) system...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28486727/as-oct-as-a-rescue-tool-during-difficult-lenticule-extraction-in-smile
#9
Jeewan S Titiyal, Anubha Rathi, Manpreet Kaur, Ruchita Falera
PURPOSE: To report a case of lenticule adherent to the anterior cap during small incision lenticule extraction (SMILE) and its subsequent management aided by anterior segment optical coherence tomography (AS-OCT). METHODS: Case report. RESULTS: A 24-year-old woman presented with high myopia of -8.00 -0.50 @ 180° in the right eye and -8.00 -0.25 @ 180° in the left eye and underwent SMILE. In the right eye, difficulty was experienced in separating the lenticule from adjacent stroma...
May 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28486724/noncontact-quantification-of-topography-of-anterior-corneal-surface-and-bowman-s-layer-with-high-speed-oct
#10
Himanshu Matalia, Mathew Francis, Tarun Gangil, Rachana S Chandapura, Mathew Kurian, Rohit Shetty, Everette Jacob Remington Nelson, Abhijit Sinha Roy
PURPOSE: To quantify keratometry and wavefront aberration of the anterior corneal surface and epithelium-Bowman's layer interface using anterior segment optical coherence tomography (OCT). METHODS: Twenty-five normal eyes and 25 eyes with keratoconus were retrospectively analyzed. The anterior corneal edge and epithelium-Bowman's layer interface were segmented from 12 distortion-corrected OCT B-scans. Axial tangential curvatures and wavefront aberration were calculated by ray tracing and 6th order Zernike analyses...
May 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28486513/angle-stability-and-outflow-in-dual-blade-ab-interno-trabeculectomy-with-active-versus-passive-chamber-management
#11
Chao Wang, Yalong Dang, Susannah Waxman, Xiaobo Xia, Robert N Weinreb, Nils A Loewen
PURPOSE: To compare intraoperative angle stability and postoperative outflow of two ab interno trabeculectomy devices that excise the trabecular meshwork with or without active aspiration and irrigation. We hypothesized that anterior segment optical coherence tomography (AS-OCT) allows for a quantitative comparison of intraoperative angle stability in a microincisional glaucoma surgery (MIGS) pig eye training model. METHODS: Twelve freshly enucleated porcine eyes were measured with AS-OCT at baseline, at the beginning of the procedure and at its conclusion to determine the anterior chamber depth (ACD) and the nasal angle α in degrees...
2017: PloS One
https://www.readbyqxmd.com/read/28486274/a-novel-method-for-assessing-lamina-cribrosa-structure-ex-vivo-using-anterior-segment-enhanced-depth-imaging-optical-coherence-tomography
#12
Jason L Chien, Mark P Ghassibi, Pooja Mahadeshwar, Pengcheng Li, Jeffrey M Liebmann, Robert Ritch, Tatyana Milman, Sung Chul Park
PURPOSE: The purpose of this study is to investigate the use of anterior segment enhanced depth imaging (EDI) optical coherence tomography (OCT) for ex vivo lamina cribrosa (LC) imaging. MATERIALS AND METHODS: After removing anterior segment and vitreous, the optic nerve head (ONH) tissue of porcine eyes was placed on a customized eye holder for imaging. Serial EDI OCT B-scans (interval, ∼35 μm) of the ONH were obtained using anterior segment module of spectral-domain OCT...
May 8, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28481832/new-technique-of-femtosecond-laser-assisted-intracorneal-ring-segment-implantation
#13
Luis Izquierdo, Alejandra Orozco, Maria A Henriquez
PURPOSE: To describe a new technique of femtosecond laser-assisted intracorneal ring segment implantation. METHODS: The study included 6 eyes of 5 patients. Software of the LDV Z6 femtosecond laser was modified to create a 110-degree reverse side cut between the corneal surface and incision instead of the conventional 90 degree angle (which changed the angle between the incision and tunnel from conventional 90-70 degrees) and 2 disjointed tunnels separated by 10 degrees arc length at the proximal and distal ends...
May 3, 2017: Cornea
https://www.readbyqxmd.com/read/28477325/clinical-practice-a-proposed-standardized-ophthalmological-assessment-for-patients-with-cystinosis
#14
REVIEW
Anne-Marie Pinxten, Minh-Tri Hua, Jennifer Simpson, Katharina Hohenfellner, Elena Levtchenko, Ingele Casteels
Cystinosis is a rare autosomal recessive disease with an incidence of approximately 1 case per 100,000-200,000 live births. Over the years, gaining in-depth knowledge of the disease has led to vast improvement in patient life expectancy. However, debilitating, extra-renal manifestations such as eye disease, in particular corneal crystal deposition and its associated photophobia, still occur frequently, regardless of patient age and notwithstanding the increased implementation of systemic therapy. Ophthalmological assessment has not yet been standardized...
May 5, 2017: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/28476917/optical-coherence-tomography-of-the-kayser-fleischer-ring-an-ancillary-diagnostic-tool-for-wilson-s-disease-in-children
#15
Anubha Rathi, Brijesh Takkar, Nripen Gaur, Prafulla Kumar Maharana
This report presents anterior segment optical coherence tomography (AS-OCT) images of Kayser-Fleischer ring (KFR) in a child. The AS-OCT images highlight differential reflectivity of the KFR depending on amount of copper deposited in cornea, thus supporting the role of AS-OCT as a follow-up tool. Utility of AS-OCT for diagnosing and documenting the KFR in children otherwise uncooperative for detailed slit lamp examination is discussed.
May 5, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28470656/-laser-iridotomy-in-cases-of-acute-angle-closure-only
#16
Daniel M Handzel, Carsten H Meyer, Alfred Wegener
The narrowing of the chamber angle-as a result of anatomic predispositions like high hyperopia or increasing lens thickness-poses the greatest risk for acute angle closure. A laser iridotomy counts as a standard procedure in cases of acute angle closure, whereas there are no coherent recommendations or guidelines for a prophylactic therapy. Modern imaging techniques, such as anterior segment optical coherence tomography or Scheimpflug photography, can give valuable information for the planning of treatment...
May 3, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28465835/a-rabbit-model-study-to-determine-the-efficacy-of-a-prototype-corneal-endothelium-protector-during-cataract-surgery
#17
Annabel C Y Chew, Anita Chan, Monisha E Nongpiur, Gary Peh, Veluchamy A Barathi, Nyein C Lwin, Charles Ong, Shamira Perera
Purpose. We evaluated the efficacy and safety of a mechanical device, the P-chute, in corneal endothelium preservation during phacoemulsification in a rabbit model. Methods. Twenty-four rabbits were randomly assigned into 2 groups. One eye of each rabbit underwent phacoemulsification that simulated the removal of a dense nucleus, with or without the P-chute. Serial slit-lamp examinations, anterior segment optical coherence tomography (ASOCT) scans, and specular microscopy were performed. Three rabbits from each group were sacrificed on postoperative days (PODs) 1, 5, 7, and 14...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28454898/prospective-study-of-filtering-blebs-after-xen45-surgery
#18
Á Olate-Pérez, V T Pérez-Torregrosa, A Gargallo-Benedicto, P Neira-Ibáñez, M Cerdà-Ibáñez, V Osorio-Alayo, A Barreiro-Rego, A Duch-Samper
OBJECTIVE: To qualitatively analyse the evolution of filtering blebs after XEN surgery, by using anterior segment optical coherence tomography (AS-OCT). METHODS: A prospective study was performed on filtering blebs of 30 eyes with cataracts and glaucoma, surgically operated on using phacoemulsification and XEN45 implantation (PHACO-XEN). AS-OCT was used to analyse bleb morphology and reflectivity at 3, 6, and 12 months after surgery. Functionality was studied considering an intraocular pressure (IOP)≤18mmHg without antihypertensive medication...
April 25, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28453367/retinal-pigment-epithelium-photoreceptor-layer-alterations-in-a-patient-with-sturge-weber-syndrome-with-diffuse-choroidal-hemangioma
#19
Solmaz Abdolrahimzadeh, Francesco Parisi, Flavio Mantelli, Andrea Perdicchi, Gianluca Scuderi
PURPOSE: To describe an 8-year-old girl with diagnosis of Sturge-Weber syndrome (SWS) presenting with glaucoma, abnormal iris vessels, diffuse choroidal hemangioma, and small white dot-shaped "microdrusen-like" alterations of the retina in the right eye. PATIENT AND METHODS: Complete ophthalmological examination was performed with slit-lamp anterior segment assessment and fundus ophthalmoscopy. Near infrared reflectance (NIR) and enhanced depth imaging (EDI) spectral domain optical coherence tomography (SD-OCT) were carried out...
April 28, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28441067/anterior-segment-optical-coherence-tomography-angiography-for-identification-of-iris-vasculature-and-staging-of-iris-neovascularization-a-pilot-study
#20
Philipp K Roberts, Debra A Goldstein, Amani A Fawzi
Purpose/Aim of the study: To assess the ability of optical coherence tomographic angiography (OCTA) to visualize the normal iris vasculature as well as neovascularization of the iris (NVI). MATERIALS AND METHODS: Study participants with healthy eyes, patients at risk of NVI development and patients with active or regressed NVI were consecutively included in this cross-sectional observational study. Imaging was performed using a commercially available OCTA system (RTVue- XR Avanti, Optovue Inc...
April 25, 2017: Current Eye Research
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