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Anterior segment optical coherence tomography

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https://www.readbyqxmd.com/read/28434071/repeatability-and-agreement-of-central-corneal-thickness-measurement-with-non-contact-methods-a-comparative-study
#1
Tarannum Mansoori, Nagalla Balakrishna
PURPOSE: To compare the central corneal thickness (CCT) measurements and reliability of RTVue XR-100 anterior segment optical coherence tomography (AS-OCT), AL-scan optical biometer and Schwind Sirius anterior segment analysis system. METHODS: The CCT was measured in one hundred and twenty-seven eyes of 127 healthy subjects with AS-OCT, AL-scan and Sirius system. Mean CCT was compared among the instruments, and the level of agreement was assessed using Bland-Altman plots...
April 22, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28432110/anterior-but-not-posterior-choroid-changed-before-and-during-valsalva-manoeuvre-in-healthy-chinese-a-ubm-and-ss-oct-study
#2
Fei Li, Kai Gao, Xingyi Li, Shida Chen, Wenbin Huang, Xiulan Zhang
PURPOSE: To determine if the anterior choroid is involved in ocular change during the Valsalva manoeuvre (VM). MATERIALS AND METHODS: Fifty-three healthy volunteers aged 18-65 years with normal visual field test results and no history of intraocular pressure (IOP) exceeding 21 mm Hg were recruited. Anterior and posterior choroidal changes before and during VM were recorded by ultrasound microscope and swept-source optical coherence tomography, respectively. Parameters of the anterior segment included ciliary body thickness (CBT0), thickness of the choroid at a distance of 4 mm from the root of the iris (CT4), anterior placement of the ciliary body (APCB) and trabecular-ciliary angle (TCA)...
April 21, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28421398/supradescemetic-voriconazole-injection-for-candida-parapsilosis-keratitis
#3
Nikolaos Mamas, Konstantinos Andreanos, Klio Chatzistefanou, Petros Petrou, Dimitrios Brouzas, George Kymionis, Chrysanthi Koutsandrea, Konstantinos Droutsas
PURPOSE: To describe a technique for intracorneal application of voriconazole into the supradescemetic space in a case of deep recalcitrant Candida parapsilosis keratitis of a penetrating cornea graft. METHODS: A deep intracorneal incision reaching the center of the corneal infiltrate was created with a 20-gauge MVR blade. Then, a 27-gauge hydrodissection cannula was inserted deep into the corneal pocket, and 0.1 ml of voriconazole 0.5 mg/ml was injected until a bullous detachment of Descemet membrane (DM) covered 1/3 of the graft's area...
April 18, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28407166/evaluation-of-the-true-wavefront-aberrations-in-eyes-implanted-with-a-rotationally-asymmetric-multifocal-intraocular-lens
#4
Vyas Akondi, Pablo Pérez-Merino, Eduardo Martinez-Enriquez, Carlos Dorronsoro, Nicolás Alejandre, Ignacio Jiménez-Alfaro, Susana Marcos
PURPOSE: Standard evaluation of aberrations from wavefront slope measurements in patients implanted with a rotationally asymmetric multifocal intraocular lens (IOL), the Lentis Mplus (Oculentis GmbH, Berlin, Germany), results in large magnitude primary vertical coma, which is attributed to the intrinsic IOL design. The new proposed method analyzes aberrometry data, allowing disentangling the IOL power pupillary distribution from the true higher order aberrations of the eye. METHODS: The new method of wavefront reconstruction uses retinal spots obtained at both the near and far foci...
April 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28399067/role-of-the-corneal-epithelium-measurements-in-keratorefractive-surgery
#5
Marcella Q Salomão, Ana Luisa Hofling-Lima, Bernardo T Lopes, Ana Laura C Canedo, Daniel G Dawson, Rui Carneiro-Freitas, Renato Ambrósio
PURPOSE OF REVIEW: Refractive surgery has stimulated considerable progress in corneal and anterior segment imaging, and optical characterization of the eye. From front surface corneal topography, we evolved to three-dimensional corneal tomography with limbus to limbus characterization of the front and back corneal surfaces and pachymetric mapping. Corneal anatomical evaluation has further evolved to layered or segmental tomography with the ability to characterize corneal epithelial thickness profile and the elevation of stromal front surface...
April 8, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28399038/intraoperative-optical-coherence-tomography-assisted-descemet-stripping-automated-endothelial-keratoplasty-for-anterior-chamber-fibrous-ingrowth
#6
Tarek A Shazly, Lillian K To, Ian P Conner, Ladan Espandar
PURPOSE: Here, we present the first reported case of intraoperative optical coherence tomography (OCT)-assisted Descemet membrane stripping automated endothelial keratoplasty (DSAEK) in a patient with anterior segment fibrous ingrowth. METHODS: A 61-year-old woman with corneal edema and chronic angle-closure glaucoma secondary to fibrous ingrowth after 2 glaucoma shunt device implantations underwent dissection and removal of anterior chamber fibrous ingrowth and DSAEK...
April 10, 2017: Cornea
https://www.readbyqxmd.com/read/28389927/post-mortem-imaging-of-the-infant-and-perinatal-dura-mater-and-superior-sagittal-sinus-using-optical-coherence-tomography
#7
Emma C Cheshire, Roger D G Malcomson, Shiju Joseph, Asif Adnan, David Adlam, Guy N Rutty
Infants and young children are likely to present with subdural haemorrhage (SDH) if they are the victims of abusive head trauma. In these cases, the most accepted theory for the source of bleeding is the bridging veins traversing from the surface of the brain to the dura mater. However, some have suggested that SDH may result from leakage of blood from a dural vascular plexus. As post-mortem examination of the bridging veins and dura is challenging, and imaging modalities such as magnetic resonance and computed tomography do not have the resolution capabilities to image small blood vessels, we have trialled the use of intravascular and benchtop optical coherence tomography (OCT) systems for imaging from within the superior sagittal sinus (SSS) and through the dura during five infant/perinatal autopsies...
April 7, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28385302/subclassification-of-primary-angle-closure-using-anterior-segment-optical-coherence-tomography-and-ultrasound-biomicroscopic-parameters
#8
Junki Kwon, Kyung Rim Sung, Seungbong Han, Ye Ji Moon, Joong Won Shin
PURPOSE: To classify eyes with primary angle closure (PAC) in terms of the features visualized using anterior segment optical coherence tomography (AS-OCT) and ultrasound biomicroscopy (UBM). DESIGN: Retrospective, observational study. PARTICIPANTS: A total of 73 eyes of 73 patients with PAC. METHODS: Participants' eyes that had undergone laser peripheral iridotomy (LPI) were imaged using AS-OCT and UBM under the same lighting conditions...
April 3, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28378252/intravitreal-dexamethasone-implant-for-recalcitrant-cystoid-macular-edema-secondary-to-retinitis-pigmentosa-a-pilot-study
#9
Aditya Sudhalkar, Laurent Kodjikian, Nishikant Borse
BACKGROUND: To determine the utility of the intravitreal dexamethasone implant as therapy for cystoid macular edema (CME) secondary to retinitis pigmentosa (RP) recalcitrant to carbonic anhydrase inhibitor therapy over 2 years as a pilot study. METHODS: This was a prospective case series. Patients who showed either an incomplete or no response to topical dorzolamide for at least 1 month and oral acetazolamide therapy for at least 15 days were recruited for the study with informed consent...
April 4, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28371125/comparison-of-bleb-morphology-between-trabeculectomy-and-deep-sclerectomy-using-a-clinical-grading-scale-and-anterior-segment-optical-coherence-tomography
#10
Lawrence J Oh, Eugene Wong, Julie Lam, Colin I Clement
IMPORTANCE: This study highlights the role of the filtration bleb for IOP management following Trabeculectomy (TRAB) and deep sclerectomy (DS) in Glaucoma. BACKGROUND: This study serves to analyse the bleb morphology and IOP using the Indiana bleb appearance grading scale (IBAGS) and the anterior-segment optical coherence tomography (AS-OCT) postoperatively and at 3 months. DESIGN: Retrospective study by a single surgeon. PARTICIPANTS: 28 patients with open-angle glaucoma were recruited into the study, 14 in each of the TRAB (fornix) and DS groups...
March 30, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28369003/effect-of-lateral-decubitus-body-posture-on-anterior-chamber-angle-in-healthy-subjects-an-anterior-segment-optical-coherence-tomography-study
#11
Ji-Hye Park, Dong Yun Yeon, Chungkwon Yoo, Yong Yeon Kim
PURPOSE: To investigate the effect of the lateral decubitus (LD) position on the anterior chamber (AC) angle in healthy subjects. MATERIALS AND METHODS: Twenty-three healthy young subjects were included in this prospective observational study. We measured AC angle parameters in the sitting and the left LD positions using anterior segment optical coherence tomography (Visante OCT): trabecular-iris angle (TIA), angle opening distance (AOD500), trabecular-iris space area (TISA500), anterior chamber width, lens vault, and anterior chamber depth...
March 31, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28367188/efficacy-of-intravitreal-bevacizumab-combined-with-pan-retinal-photocoagulation-versus-panretinal-photocoagulation-alone-in-treatment-of-proliferative-diabetic-retinopathy
#12
Murtaza Sameen, Muhammad Saim Khan, Ahsan Mukhtar, Muhammad Amer Yaqub, Mazhar Ishaq
OBJECTIVE: To compare effectiveness of pan-retinal photocoagulation alone versus panretinal photocoagulation combined with intravitreal bevacizumab on visual acuity and central macular thickness in patients presenting with proliferative diabetic retinopathy. METHODS: This Randomized controlled trial was carried out at Armed Forces Institute of ophthalmology, Pakistan from Jan 2016 to Aug 2016. Seventy six eyes of 50 patients having proliferative diabetic retinopathy and diabetic macular edema were included in the study...
January 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28366677/change-in-vault-during-scleral-lens-trials-assessed-with-anterior-segment-optical-coherence-tomography
#13
Varsha M Rathi, Preeji S Mandathara, Srikanth Dumpati, Virender S Sangwan
PURPOSE: To assess the change in vault during scleral lens fitting with anterior segment optical coherence tomography (AS-OCT). METHODS: This study comprised of patients who had AS-OCT performed after 1h and 4h of scleral lens wear (PROSE, prosthetic replacement of the ocular surface ecosystem, Boston Foundation for Sight, Needham Heights, MA, USA). Vault was measured on AS-OCT as the distance between the front surface of the cornea in the center and the back surface of the scleral lens...
March 30, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28358967/acute-bilateral-photoreceptor-degeneration-in-an-infant-after-vaccination-against-measles-and-rubella
#14
Kazuki Kuniyoshi, Yoshikazu Hatsukawai, Sadami Kimura, Takahiro Fujino, Hiroshi Ohguro, Rie Nakai, Kenta Sunami, So-Ichiro Mishima, Tomoko Sato, Shunji Kusaka, Yasuhiro Suzuki, Yoshikazu Shimomura
Importance: Ocular inflammation is occasionally observed after vaccinations, and most of them resolve without permanent visual disturbances. However, there are some rare cases of severe ocular complications following vaccinations. Objective: To report the findings in an infant boy who developed an acute loss of vision bilaterally after Haemophilus influenzae type b, Pneumococcal conjugate vaccination, and measles and rubella vaccination. His vision did not recover...
March 30, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28357886/clinical-appraisal-and-retinal-imaging-in-posterior-microphthalmos
#15
Kemal Tekin, Mehmet Yasin Teke, Mehmet Citirik
PURPOSE: To report a critical case series of five patients with posterior microphthalmos and the review of their clinical findings with the analyses of retinal imaging. METHOD: Case series. Complete ophthalmological examinations including optical coherence tomography (OCT) were evaluated. RESULTS: All patients had decreased visual acuity with high hyperopic refraction. Dilated fundus examination demonstrated that elevated papillomacular retinal folds with anterior segment were unremarkable...
February 15, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/28356776/diabetic-papillopathy-treated-with-intravitreal-ranibizumab
#16
Mine Yildirim, Deniz Kilic, Mehmet Emin Dursun, Birgul Dursun
In this report, we present a case of diabetic papillopathy that resolved after a single dose of intravitreal ranibizumab injection. A 50-year-old male presented with painless visual loss in his right eye. His visual acuity was 1/10 in the right eye and 10/10 in the left eye. Anterior segment examination of both eyes was unremarkable. Posterior segment of the right eye showed nonproliferative diabetic retinopathy with a swollen optic disc. Fluorescein angiography and optical coherence tomography were performed...
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28345566/intraoperative-optical-coherence-tomography-in-anterior-segment-surgeries
#17
Jeewan S Titiyal, Manpreet Kaur, Ruchita Falera
Intraoperative optical coherence tomography (iOCT) is a noninvasive imaging modality that provides a real-time dynamic feedback of the various surgical steps. Comprehensive literature search was performed in MEDLINE using "intraoperative optical coherence tomography" and "iOCT" as keywords. The use of iOCT as an aid to decision-making has been successfully reported in cases undergoing keratoplasty, implantable Collamer lens (ICL) implantation as well as cataract surgery. iOCT helps to assess the graft-host relationship in penetrating keratoplasty...
February 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28339057/gpr143-mutations-in-chinese-patients-with-ocular-albinism-type-1
#18
Xiuhua Jia, Jin Yuan, Xiaoyun Jia, Shiqi Ling, Shiqiang Li, Xiangming Guo
The aim of the present study was to evaluate mutations of the G protein-coupled receptor 143 (GPR143) gene for ocular albinism type 1 (OA1) in Chinese patients. For the current study, 8 patients with OA1 were selected from the database of ocular genetic diseases. Genomic DNA of OA1 was prepared from venous leukocytes collected from the patients. Cycle sequencing was used to analyze the exons and adjacent introns of GPR143. The variation detected was analyzed by bidirectional DNA sequencing and further evaluated in 96 controls using heteroduplex‑single strand conformational polymorphism analysis...
March 23, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28335747/effects-of-diurnal-lighting-and-angle-of-incidence-variation-on-anterior-segment-optical-coherence-tomography-as-oct-angle-metrics
#19
Handan Akil, Anna Dastiridou, Kenneth Marion, Brian A Francis, Vikas Chopra
BACKGROUND: First reported study to assess the effect of diurnal variation on anterior chamber angle measurements, as well as, to re-test the effects of lighting and angle-of-incidence variation on anterior chamber angle (ACA) measurements acquired by time-domain anterior segment optical coherence tomography (AS-OCT). METHODS: A total of 30 eyes from 15 healthy, normal subjects underwent anterior chamber imaging using a Visante time-domain AS-OCT according to an IRB-approved protocol...
March 23, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28333853/multimodal-imaging-in-vortex-vein-varices
#20
Chiara Veronese, Giovanni Staurenghi, Marco Pellegrini, Chiara Maiolo, Laura Primavera, Mariachiara Morara, Grayson W Armstrong, Antonio P Ciardella
PURPOSE: The aim of this study is to describe the clinical presentation of vortex vein varices with multimodal imaging. METHODS: The authors carried out a retrospective case series of eight patients (7 female, 1 male) with an average age of 60.2 years (min 8, max 84, median 68.5) presenting with vortex vein varices. All patients were evaluated at the Sant'Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy and at Luigi Sacco Hospital, University of Milan, Milan, Italy...
March 22, 2017: Retinal Cases & Brief Reports
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