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Anterior segment optical coherence tomography

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https://www.readbyqxmd.com/read/28641034/imaging-of-proximal-lacrimal-system-with-time-domain-anterior-segment-optical-coherence-tomography-in-asian-indian-population
#1
Swati Singh, Arnav Ghosh, Suryasnata Rath
This article reports proximal lacrimal system parameters using Anterior Segment Optical Coherence Tomography (ASOCT-Visante) in an apparently normal Asian Indian population with assessment of any correlation between tear meniscus height and punctal diameter. This was a prospectively designed observational study that included healthy adults, who volunteered for optical coherence tomography imaging (OCT) of their proximal lacrimal system. Time domain ASOCT (Visante) images of the punctum and proximal canaliculus were captured using the high resolution corneal scan protocol...
June 22, 2017: Orbit
https://www.readbyqxmd.com/read/28632845/iris-malformation-and-anterior-segment-dysgenesis-in-mice-and-humans-with-a-mutation-in-pi-3-kinase
#2
Marie H Solheim, Allen C Clermont, Jonathon N Winnay, Erlend Hallstensen, Anders Molven, Pål R Njølstad, Eyvind Rødahl, C Ronald Kahn
Purpose: To determine the ocular consequences of a dominant-negative mutation in the p85α subunit of phosphatidylinositol 3-kinase (PIK3R1) using a knock-in mouse model of SHORT syndrome, a syndrome associated with short stature, lipodystrophy, diabetes, and Rieger anomaly in humans. Methods: We investigated knock-in mice heterozygous for the SHORT syndrome mutation changing arginine 649 to tryptophan in p85α (PIK3R1) using physical examination, optical coherence tomography (OCT), tonometry, and histopathologic sections from paraffin-embedded eyes, and compared the findings to similar investigations in two human subjects with SHORT syndrome heterozygous for the same mutation...
June 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28632029/longitudinal-evaluation-of-wound-healing-after-penetrating-corneal-injury-anterior-segment-optical-coherence-tomography-study
#3
Kang Keng Zheng, Jianhao Cai, Shi Song Rong, Kun Peng, Honghe Xia, Chuan Jin, Xuehui Lu, Xinyu Liu, Haoyu Chen, Vishal Jhanji
PURPOSE: Ocular imaging can enhance our understanding of wound healing. We report anterior segment optical coherence tomography (ASOCT) findings in penetrating corneal injury. METHODS: Serial ASOCT was performed after repair of penetrating corneal injury. Internal aberrations of wound edges were labeled as "steps" or "gaps" on ASOCT images. The wound type was characterized as: type 1: continuous inner wound edge or step height ≤ 80 µm; type 2: step height > 80 µm; type 3: gap between wound edges; and type 4: intraocular tissue adherent to wound...
February 26, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28630789/efficacy-of-intravitreal-bevacizumab-in-treatment-of-proliferative-type-2-idiopathic-juxtafoveal-telangiectasia
#4
Ökkeş Baz, İhsan Yılmaz, Cengiz Alagöz, Ali Demircan, İrfan Perente, Abdullah Özkaya, Muhittin Taşkapılı
OBJECTIVES: To evaluate the effectiveness of intravitreal bevacizumab (IVB) in patients with subretinal neovascularization secondary to type 2 juxtafoveal telangiectasia. MATERIALS AND METHODS: Ten eyes of 10 patients were included in this retrospective study. All cases were treated with IVB (1.25 mg bevacizumab). Visual acuity and slit-lamp anterior and posterior segment examinations were performed at each visit. Central macular thickness (CMT) and intraretinal/subretinal fluid were evaluated via spectral domain optical coherence tomography (OCT)...
June 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28627080/comparison-of-subconjunctival-scarring-after-microincision-vitrectomy-surgery-using-20-23-25-and-27-gauge-systems-in-rabbits
#5
Makoto Gozawa, Yoshihiro Takamura, Seiji Miyake, Kentaro Iwasaki, Shogo Arimura, Yuji Takihara, Masaru Inatani
PURPOSE: To compare subconjunctival scarring after vitrectomy in rabbit eyes using different gauge systems by analysing anterior segment optical coherence tomography (AS-OCT) images and histological sections. METHODS: Vitrectomy using 20-, 23-, 25- and 27-gauge systems was performed for rabbits. Anterior segment optical coherence tomography (AS-OCT) images of the incision sites were obtained before and at day 1, 7 and 1 month after surgery. We measured the thickness of conjunctival epithelium, stroma, Tenon's capsule and total conjunctiva of these three layers, then determined the preservation rates of the borderlines between each layer...
June 19, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28625685/objective-quantification-of-anterior-chamber-inflammation-measuring-cells-and-flare-by-anterior-segment-optical-coherence-tomography
#6
Alessandro Invernizzi, Sylvia Marchi, Raffaella Aldigeri, Valentina Mastrofilippo, Fabiana Viscogliosi, Annamaria Soldani, Chantal Adani, Elena Garoli, Francesco Viola, Luigi Fontana, Peter McCluskey, Luca Cimino
PURPOSE: To assess the ability of swept-source (SS) optical coherence tomography (OCT) of the anterior segment (AS) to measure anterior chamber (AC) inflammation (both flare and cells) objectively. To compare OCT-derived inflammatory indices with standard techniques. DESIGN: Prospective evaluation of a diagnostic test. PARTICIPANTS: Patients diagnosed with anterior uveitis (active or inactive) and controls. METHODS: Participants underwent an AC inflammation evaluation including: clinical cell and flare grading and laser flare photometry (LFP)...
June 16, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28622324/postoperative-change-in-lateral-rectus-muscle-insertion-measured-by-anterior-segment-optical-coherence-tomography
#7
J-Y Lee, K-A Park, I J Lyu, S Y Oh
AimsThe aims of this study were to investigate the longitudinal change in lateral rectus (LR) muscle insertion after recession surgery, and to evaluate a relationship between insertion distance and postoperative amount of deviation.MethodsWe recruited 31 patients who underwent primary LR recession surgery with normal anterior segment structures. An AS-OCT scan of the LR muscle was performed at every visit. Data on sex, age, degree of deviation (prism diopter), and spur-LR insertion distance using AS-OCT were collected at preoperatively and postoperative months 1, 3, and 6...
June 16, 2017: Eye
https://www.readbyqxmd.com/read/28614155/the-role-of-the-back-plate-in-angle-anatomy-with-the-boston-type-i-keratoprosthesis
#8
Elise V Taniguchi, Eleftherios I Paschalis, Alja Crnej, Ai Ren, Kathryn A Colby, James Chodosh, Louis R Pasquale, Lucy Q Shen, Claes H Dohlman, Andrea Cruzat
PURPOSE: To quantitatively evaluate the angle anatomy in eyes with the Boston type I keratoprosthesis (B-KPro) differing in the back plate (BP) material and size using anterior segment optical coherence tomography. METHODS: B-KPro eyes with poly(methyl methacrylate) (PMMA) (7.0 and 8.5 mm) and titanium (7.0, 8.5, and 9.5 mm) BPs were imaged with anterior segment optical coherence tomography. The angle opening distance at 500 μm from the scleral spur (AOD500), trabecular iris surface area at 500 μm from the scleral spur (TISA500), and trabecular iris angle at 500 μm from the scleral spur (TIA500) were measured...
June 13, 2017: Cornea
https://www.readbyqxmd.com/read/28608030/intracorneal-ring-segment-depth-in-keratoconus-patients-a-long-term-follow-up-study
#9
Saied Shahhoseini, Hassan Hashemi, Soheila Asgari
PURPOSE: To compare the actual depth of the tunnel created with femtosecond laser for intracorneal ring segment (ICRS) implantation with the target depth in keratoconus patients. METHODS: In this mix design study, eligible keratoconus patients were identified through chart review. The inclusion criterion was a history of ICRS implantation with femtosecond laser more than 6 months prior to enrollment. Participants underwent anterior segment optical coherence tomography using Spectralis (Heidelberg Engineering GmbH, Heidelberg, Germany) for depth measurement defined as the distance from the anterior corneal surface to anterior rim of the ring...
June 12, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28593180/surgical-management-of-spontaneous-late-onset-descemet-membrane-detachment-after-penetrating-keratoplasty-for-keratoconus-a-case-report
#10
Myrsini Petrelli, Konstantinos Oikonomakis, Konstantinos Andreanos, Andreas Mouchtouris, Ilias Georgalas, George Kymionis
BACKGROUND: To report a surgical method for treating corneal oedema in a case of late-onset Descemet membrane detachment after penetrating keratoplasty. CASE PRESENTATION: A 55-year old patient presented with sudden visual loss in his left eye 28 years after penetrating keratoplasty for keratoconus. Slit-lamp biomicroscopy revealed a distortion of the corneal graft anatomy with protrusion of the graft and peripheral thinning and steepening in the residual host tissue, accompanied by corneal graft oedema...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28591282/incidence-of-anterior-segment-neovascularization-during-intravitreal-treatment-for-macular-edema-secondary-to-central-retinal-vein-occlusion
#11
Luiz Filipe Adami Lucatto, Octaviano Magalhães-Junior, Juliana M B Prazeres, Adriano M Ferreira, Ramon A Oliveira, Nilva S Moraes, Flávio E Hirai, Mauricio Maia
Purpose: To analyze the effects of injections of intravitreal triamcinolone acetonide (IVTA) and intravitreal bevacizumab (IVB) on the incidence rates of anterior segment neovascularization (ASN) and neovascular glaucoma (NVG) in patients with macular edema secondary to central retinal vein occlusion (CRVO). Methods: In this prospective, randomized, double-masked, sham-controlled study, 35 patients with macular edema following CRVO were randomized to intravitreal bevacizumab, intravitreal triamcinolone acetonide, or sham injections during the first 6 months of the study...
March 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28588646/the-effects-of-tolterodine-on-anterior-segment-and-choroidal-thickness-in-patients-with-overactive-bladder-syndrome
#12
Hande Hüsniye Telek, Omer Gokhan Doluoglu, Ayse Burcu, Gulizar Demirok, Firdevs Ornek, Ali Ayyildiz
BACKGROUND: To evaluate the effects of tolterodine on anterior segment and choroidal thickness by using the Pentacam system and optical coherence tomography (OCT) (Pentacam). METHODS: A total of 122 eyes of 61 patients (34 female; 27 male) were included in the study. All patients underwent a regular ocular examination and intraocular pressure measurements before and after 3 months of antimuscarinic drug tolterodine treatment, in addition, pupil diameter, anterior chamber depth, anterior chamber volume, anterior chamber angle, and lens thickness were measured through Pentacam (Oculus Inc...
October 2017: Therapeutic Advances in Urology
https://www.readbyqxmd.com/read/28573989/evaluation-of-kayser-fleischer-ring-in-wilson-disease-by-anterior-segment-optical-coherence-tomography
#13
Mittanamalli S Sridhar, Advithi Rangaraju, Kavitha Anbarasu, Sharat Putta Reddy, Sachin Daga, Sita Jayalakshmi, Bajibhi Shaik
PURPOSE: The purpose of the study is to present anterior segment optical coherence tomography (AS-OCT) as an alternative method of evaluating Kayser-Fleischer (KF) ring in Wilson disease (WD) not only by ophthalmologists but also by other clinicians dealing with WD. MATERIALS AND METHODS: This was a retrospective case series of six WD patients with KF ring. Evaluation of KF ring was done by naked eye examination using torch light, slit lamp biomicroscopy (SL), and AS-OCT...
May 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28567361/unexpected-evolution-of-a-non-stenotic-lesion-in-the-left-main-coronary-artery-of-a-patient-with-non-st-segment-elevation-myocardial-infarction
#14
Alexandru Florin Ispas, Lionel Mangin, Alexandru Paziuc, Loic Belle
A 72-year-old man was referred to our catheterization laboratory 48 hours after a non-ST-segment elevation myocardial infarction. His medical history included coronary artery disease (CAD) (percutaneous coronary intervention of the right coronary artery and chronic total occlusion of the circumflex artery), atrial fibrillation (AF), and chronic kidney disease. An electrocardiogram showed a pre-existent left bundle-branch block and the patient's maximum cardiac troponin concentration was 8.64 µg/L (upper limit of normal: 0...
June 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28559715/intrasession-repeatability-of-pachymetry-measurements-with-rtvue-xr-100-optical-coherence-tomography-in-normal-cornea
#15
Tarannum Mansoori, Nagalla Balakrishna
PURPOSE: To assess intra-observer reproducibility and repeatability of corneal pachymetry measurements with RTVue XR-100 anterior segment optical coherence tomography (AS-OCT) in normal cornea. METHODS: Eighty-four eyes of 84 healthy volunteers were enrolled for this study. A single examiner performed 3 successive corneal pachymetry mappings with RTVue XR-100 AS -OCT in a single session. One eye was randomly selected for the analysis. Intrasession intraexaminer reproducibility and repeatability were calculated for the minimum corneal thickness (MCT), central corneal thickness (CCT, central 0-2 mm), pericentral (2-5 mm) and peripheral (5-6 mm) annular zones of cornea, in the pachymetry mapping protocol by intraclass correlation coefficient (ICC), coefficient of variation and test retest variability...
April 2017: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28556512/comparison-of-circumferential-peripheral-angle-closure-using-iridotrabecular-contact-index-after-laser-iridotomy-versus-combined-laser-iridotomy-and-iridoplasty
#16
Hyun-Kyung Cho, Changwon Kee, Heon Yang, Hyoun Do Huh, Su Jin Kim, Young Min Park, Jong Moon Park
PURPOSE: To compare the quantitative changes of peripheral angle after laser iridotomy (LI) alone (group A) or combined LI and Iridoplasty (group B) using iridotrabecular contact (ITC) index by swept-source anterior segment optical coherence tomography (AS-OCT). METHODS: In this prospective comparative observational study, OCT images were obtained before and after the procedure. In each image frame, scleral spur (SS) and the ITC end point (EP) were marked and ITC index was calculated as a percentage of the angle closure from 360°...
May 27, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28553560/optical-coherence-tomography-reveals-changes-to-corneal-reflectivity-and-thickness-in-individuals-with-tear-hyperosmolarity
#17
Laura Adelaide Deinema, Algis Jonas Vingrys, Holly Rose Chinnery, Laura Elizabeth Downie
PURPOSE: To investigate whether tear hyperosmolarity, a feature of dry eye disease (DED), affects central corneal thickness (CCT), corneal light reflectivity, and/or tear film reflectivity. METHODS: This prospective, cross-sectional study involved 48 participants (38 with hyperosmolar tears and 10 controls with normo-osmolar tears). Symptoms and signs of DED (tear osmolarity, sodium fluorescein tear break-up time, ocular surface staining, Schirmer test) were assessed...
May 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28546926/iontophoresis-assisted-corneal-crosslinking-using-0-1-riboflavin-for-progressive-keratoconus
#18
Hong-Zhen Jia, Xu Pang, Zheng-Jun Fan, Na Li, Gang Li, Xiu-Jun Peng
AIM: To report the clinical results of iontophoresis-assisted epithelium-on corneal crosslinking (I-CXL) using 0.1% riboflavin in distilled water for progressive keratoconus. METHODS: In this prospective clinical study, we examined 94 eyes of 75 patients with progressive keratoconus who were treated with I-CXL using 0.1% riboflavin in distilled water. Best correct visual acuity (BCVA), Scheimpflug tomography, corneal topography, anterior segment optical coherence tomography, intraocular pressure, and endothelial cell density were evaluated at baseline and 1, 3, 6, 12, and 24mo after I-CXL...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28545414/the-observation-during-small-incision-lenticule-extraction-for-myopia-with-corneal-opacity
#19
Shaowei Zhang, Haipeng Xu, Ke Zheng, Jing Zhao, Weijun Jian, Meiyan Li, Xingtao Zhou
BACKGROUND: To evaluate the feasibility and efficacy of small incision lenticule extraction (SMILE) in the treatment of myopia with corneal opacity. METHODS: To evaluate the treatment of myopia with corneal opacity, 9 patients (4 males, 5 females) who underwent SMILE were enrolled in this prospective clinical study. One eye of each patient was treated. The results of laser scanning and lenticule extraction were observed during the surgery, and the surgical videos were again reviewed after surgery...
May 25, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28542344/dynamic-changes-of-anterior-segment-in-patients-with-different-stages-of-primary-angle-closure-in-both-eyes-and-normal-subjects
#20
Jialiu Lin, Zhonghao Wang, Chuchen Chung, Jianan Xu, Miaomiao Dai, Jingjing Huang
PURPOSE: To compare changes in anterior segment parameters under light and dark (light-to-dark) conditions among eyes with chronic primary angle-closure glaucoma (CPACG), fellow eyes with confirmed or suspect primary angle-closure (PAC or PACS), and age-matched healthy eyes. METHODS: Consecutive patients with CPACG in one eye and PAC/PACS in the fellow eye, as well as age-matched healthy subjects were recruited. Anterior segment optical coherence tomography measurements were conducted under light and dark conditions, and anterior chamber, lens, and iris parameters compared...
2017: PloS One
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