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https://www.readbyqxmd.com/read/28548648/electronic-retinal-implants-and-artificial-vision-journey-and-present
#1
REVIEW
J O Mills, A Jalil, P E Stanga
Retinitis pigmentosa and age-related macular degeneration are two significant causes of severe visual dysfunction. In both, the retinal photoreceptors degenerate, preventing successful conversion of light into electrical energy that is interpreted in the visual cortex as visual function. Artificial vision or visual function began over two centuries ago with the idea of creating artificial light pulses, or phosphenes, through cortical stimulation. The pursuit is now on to improve artificial visual function. Two retinal implants appear the most likely to succeed in the future having undergone multicentre human trials: the Argus II electronic epiretinal device (Second Sight Medical Products, CA, USA) and Alpha-IMS electronic subretinal device (Retina Implant AG, Germany)...
May 26, 2017: Eye
https://www.readbyqxmd.com/read/28542257/long-term-results-after-limited-macular-translocation-surgery-for-wet-age-related-macular-degeneration
#2
Hisaaki Oshima, Takeshi Iwase, Kohei Ishikawa, Kentaro Yamamoto, Hiroko Terasaki
PURPOSE: To evaluate the long-term results of limited macular translocation (LMT) surgery with radial chorioscleral outfolding in patients with wet age-related macular degeneration (AMD) and subfoveal choroidal neovascularization (CNV). In addition, to identify the factors associated with the final best-corrected visual acuity (BCVA). METHODS: The medical records of 20 eyes of 20 consecutive patients (65.2±9.8 years) who had undergone LMT for the treatment of wet AMD and were followed for at least 5 years, were reviewed...
2017: PloS One
https://www.readbyqxmd.com/read/28529759/high-frequency-based-features-for-low-and-high-retina-haemorrhage-classification
#3
Salim Lahmiri
Haemorrhages (HAs) presence in fundus images is one of the most important indicators of diabetic retinopathy that causes blindness. In this regard, accurate grading of HAs in fundus images is crucial for appropriate medical treatment. The purpose of this Letter is to assess the relative performance of statistical features obtained with three different multi-resolution analysis (MRA) techniques and fed to support vector machine in grading retinal HAs. Considered MRA techniques are the common discrete wavelet transform (DWT), empirical mode decomposition (EMD), and variational mode decomposition (VMD)...
February 2017: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28513113/retina-and-nerve-fiber-layer-thickness-in-eyes-with-thyroid-associated-ophthalmopathy
#4
Sharon Blum Meirovitch, Igal Leibovitch, Anat Kesler, David Varssano, Amir Rosenblatt, Meira Neuderfer
BACKGROUND: Thyroid-associated ophthalmopathy (TAO) is an inflammatory disease that affects the thyroid gland and the eye orbit. Of patients with TAO, 3%-5% have severe sight-threatening disease due to optic neuropathy Optical coherence tomography (OCT), the non-invasive imaging technology that yields high-resolution cross-sectional images of the retina, provides qualitative and quantitative data on the retina. OBJECTIVES: To apply this technique to quantitatively assess retinal nerve fiber layer (RNFL) and macular ring thicknesses in healthy subjects and in patients with TAO to determine their relationship to the severity of the orbital disease...
May 2017: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/28509680/analyzing-dental-implant-sites-from-cone-beam-computed-tomography-scans-on-a-tablet-computer-a-comparative-study-between-ipad-and-3-display-systems
#5
Alejandro Carrasco, Elnaz Jalali, Ajay Dhingra, Alan Lurie, Sumit Yadav, Aditya Tadinada
PURPOSE: The aim of this study was to compare a medical-grade PACS (picture archiving and communication system) monitor, a consumer-grade monitor, a laptop computer, and a tablet computer for linear measurements of height and width for specific implant sites in the posterior maxilla and mandible, along with visualization of the associated anatomical structures. MATERIAL AND METHODS: Cone beam computed tomography (CBCT) scans were evaluated. The images were reviewed using PACS-LCD monitor, consumer-grade LCD monitor using CB-Works software, a 13″ MacBook Pro, and an iPad 4 using OsiriX DICOM reader software...
May 15, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28501829/genetic-causes-of-optic-nerve-hypoplasia
#6
REVIEW
Chun-An Chen, Jiani Yin, Richard Alan Lewis, Christian P Schaaf
Optic nerve hypoplasia (ONH) is the most common congenital optic nerve anomaly and a leading cause of blindness in the USA. Although most cases of ONH occur as isolated cases within their respective families, the advancement in molecular diagnostic technology has made us realise that a substantial fraction of cases has identifiable genetic causes, typically de novo mutations. An increasing number of genes has been reported, mutations of which can cause ONH. Many of the genes involved serve as transcription factors, participating in an intricate multistep process critical to eye development and neurogenesis in the neural retina...
May 13, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28492430/spectral-domain-optical-coherence-tomography-findings-in-endogenous-candida-endophthalmitis-and-their-clinical-relevance
#7
Alessandro Invernizzi, Richard Symes, Elisabetta Miserocchi, Mariano Cozzi, Matteo Cereda, Giovanni Fogliato, Giovanni Staurenghi, Luca Cimino, Peter McCluskey
PURPOSE: To describe vitreal, retinal, and choroidal features of eyes affected by Endogenous candida endophthalmitis (ECE) analyzed by spectral domain optical coherence tomography (SD-OCT) and to evaluate their clinical impact. METHODS: Medical records and SD-OCT images from eyes diagnosed with ECE at four retina and uveitis tertiary referral centers were retrospectively evaluated. Spectral domain optical coherence tomography images were analyzed to evaluate the structural changes occurring in the vitreous, the retina, and the choroid in areas involved by ECE...
May 10, 2017: Retina
https://www.readbyqxmd.com/read/28489747/postoperative-changes-in-the-retinal-thickness-and-volume-after-vitrectomy-for-epiretinal-membrane-and-internal-limiting-membrane-peeling
#8
Jae Yon Won, Mirinae Kim, Young-Hoon Park
The aim of the study was to investigate the thickness and volume profiles of each retinal layer in postoperative patients with epiretinal membranes.Twenty-four patients who underwent pars plana vitrectomy with internal limiting membrane (ILM) peeling for epiretinal membrane were included. The best corrected visual acuity, thickness, and volume were recorded from the medical records through a retrospective review. Spectral domain optical coherence tomography was used to measure the average thickness and volume of each retinal layer before surgery and 6 months postoperatively...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28486219/higher-numbers-of-hyperreflective-foci-seen-in-the-vitreous-on-spectral-domain-optical-coherence-tomographic-images-in-eyes-with-more-severe-diabetic-retinopathy
#9
Takahiro Mizukami, Yosuke Hotta, Naomichi Katai
PURPOSE: The aim of this study was to determine whether spectral-domain optical coherence tomography (SD-OCT) can detect and quantify the number of hyperreflective foci attached to the retina and in the vitreous of patients at different stages of diabetic retinopathy (DR). METHODS: The medical charts of 929 eyes of 465 patients who had undergone SD-OCT were reviewed. The number of hyperreflective foci in the vitreous and attached to the retina was determined in the SD-OCT images...
May 10, 2017: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/28470332/retinal-oxygen-saturation-correlates-with-visual-acuity-but-does-not-predict-outcome-after-anti-vegf-treatment-in-central-retinal-vein-occlusion
#10
Signe Krejberg Jeppesen, Toke Bek
Purpose: Occlusion of the central retinal vein (CRVO) is a frequent cause of visual loss. The occlusion induces hypoxia in the retina and the larger retinal veins, but the significance of retinal oxygen saturation for visual acuity at diagnosis and after anti-VEGF treatment for CRVO has not been studied in detail. Methods: Retinal oximetry was performed in 91 patients consecutively referred for specialist evaluation of CRVO. The correlation between oxygen saturation in larger retinal vessels and visual acuity at the primary examination and the predictive value of oxygen saturation for visual prognosis after three monthly intravitreal injections with anti-VEGF medication were studied...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28432417/exploring-the-possibility-of-a-retrograde-embolism-pathway-from-the-facial-artery-to-the-ophthalmic-artery-system-in-vivo
#11
Hui Zheng, Lihong Qiu, Zonghui Liu, Yingjun Su, Xinyuan Pan, Sha Liu, Chenggang Yi
BACKGROUND: Blindness caused by soft tissue fillers is an extremely low-probability event, but it results in great concern because of its devastating consequences. Currently, the mechanism of an embolism is usually considered to be an accidental injection of fillers into the blood vessels of the face, such as a facial artery, and then retrograding into the ophthalmic artery system, which causes retinal ischemic necrosis. In addition, previous studies have shown that there are anastomoses between facial arteries and branches of the ophthalmic artery in cadavers...
April 21, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28410254/decompression-retinopathy-after-goniotomy-in-a-child-a-case-report
#12
Eitan S Burstein, Peter A Netland
PURPOSE: To report a case of ocular decompression retinopathy that developed in a child after undergoing goniotomy for uncontrolled pediatric uveitic glaucoma. PATIENT AND METHODS: We describe an 11-year-old Hispanic boy with a history of idiopathic uveitis and elevated intraocular pressure (IOP) in both eyes. He developed marked elevation of the IOP in the right eye (44 mm Hg) despite glaucoma medical therapy. RESULTS: The patient's right eye was treated with goniotomy, with reduction of vision to 20/70 and IOP to between 4 and 7 mm Hg during the first week postoperatively...
April 13, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28399772/nurse-led-ranibizumab-intravitreal-injections-in-wet-age-related-macular-degeneration-a-literature-review
#13
Emma Gregg
Aim The aim of this literature review was to explore the development of the role of specialist ophthalmic nurses in delivering ranibizumab intravitreal injections to patients with wet age-related macular degeneration (AMD), and to evaluate their contribution to reducing capacity pressures in medical retina services, while maintaining safe and effective standards of care. Method A systematic literature search was undertaken to identify relevant articles published between January 2000 and June 2015. A search of electronic databases was undertaken, and selected relevant journals were searched manually...
April 12, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28368694/autoimmune-mediated-psychosis-a-case-of-susac-syndrome-in-a-drug-user
#14
Pablo Barrio, Mercè Balcells, Delón La Puma, Carles Gaig
OBJECTIVE: Susac syndrome, a rare disorder, is thought to be mediated by autoantibodies. One of the potential targets of these autoantibodies could be an antigen in the microvessels of the brain, the retina, and the inner ear leading to central nervous system (CNS) alterations, visual disturbances, and hearing deficits. Our aim is to expand clinicians' diagnostic options when facing psychosis due to medical conditions. METHODS: A case report was conducted for this study...
April 2017: Journal of Dual Diagnosis
https://www.readbyqxmd.com/read/28358967/acute-bilateral-photoreceptor-degeneration-in-an-infant-after-vaccination-against-measles-and-rubella
#15
Kazuki Kuniyoshi, Yoshikazu Hatsukawa, 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...
May 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28345824/epidemiological-characteristics-of-retinoblastoma-in-children-attending-almouassat-university-hospital-damascus-syria-2012-2016
#16
Ahmad Al Hasan, Rashad Murad, Khaldoun Zaid, Jourjous Al Daoud, Khaled Zaid
Retinoblastoma (Rb) is a malignant tumor that originates from the developing retina. Diagnosis is based on clinical signs and symptoms and usually children under the age of five years are affected. Early diagnosis and treatment of Rb and non-ocular tumors can reduce morbidity and increase longevity. Treatment in the early stages may allow a good prognosis and salvage of visual function.The aim of this study is to present descriptive epidemiological aspects of retinoblastomas in children seen at Almouassat University Hospital (AUH) in Damascus, Syria from 1 January 2012 to 31 October 2016In this retrospective, observational hospital survey, medical records of 37 retinoblastoma cases were reviewed...
February 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28333854/presumed-retinal-pigment-epithelium-tumor-originating-from-unilateral-retinal-pigment-epithelium-dysgenesis
#17
Orly Gal-Or, Paul T Finger, Yale L Fisher, Lawrence A Yannuzzi, K Bailey Freund
PURPOSE: To describe a patient with a presumed retinal pigment epithelium (RPE) tumor originating from unilateral RPE dysgenesis. METHODS: Case report. RESULTS: A 30-year-old woman with an unremarkable medical and ocular history was referred for an evaluation of progressive central metamorphopsia in her left eye. Visual acuity was 20/20 in her right eye and 20/25 in her left eye. Funduscopic examination of the left eye revealed an elevated mass within an area of unilateral RPE dysgenesis showing hyperpigmentation and hypopigmentation with scalloped margins...
March 22, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28325541/the-relationship-between-diabetic-retinopathy-and-nephropathy-in-sudanese-adult-with-diabetes-population-based-study
#18
Mohamed H Ahmed, Einas S Elwali, Heitham Awadalla, Ahmed O Almobarak
INTRODUCTION: Diabetic nephropathy is responsible for nearly third of the world cases of end stage renal disease; it becomes a major public health problem with social and economic burden. The aim of this study is to explore if there is an association between retinopathy and nephropathy. MATERIAL AND METHODS: In a cross sectional hospital based study a total of 316 individuals with diabetes were recruited from Makkah eye complex retina clinic. Demographic data, medical history and life style characteristics were taken through standard questionnaire...
March 7, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28297037/safety-of-silicone-oil-removal-in-cases-of-gunshot-perforating-eye-injuries
#19
Hammouda Hamdy Ghoraba, Sameh Mohamed Elgouhary, Hosam Osman Mansour, Hitham Mamoun Abdel-Fattah, Mohamed Amin Heikal, Emad Mohamed Elgemaey
BACKGROUND AND OBJECTIVE: To evaluate the feasibility and safety of silicone oil (SO) removal in cases of gunshot perforating eye injuries (PEI). PATIENTS AND METHODS: A retrospective, consecutive, interventional study from medical records regarding cases of gunshot PEI during the periods of Egyptian political instability (January 2011 until December 2013). The main outcomes were to evaluate the feasibility of SO removal in cases of gunshot PEI and management of retinal detachment (RD) after SO removal in such cases...
March 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28296613/autologous-induced-stem-cell-derived-retinal-cells-for-macular-degeneration
#20
Michiko Mandai, Akira Watanabe, Yasuo Kurimoto, Yasuhiko Hirami, Chikako Morinaga, Takashi Daimon, Masashi Fujihara, Hiroshi Akimaru, Noriko Sakai, Yumiko Shibata, Motoki Terada, Yui Nomiya, Shigeki Tanishima, Masahiro Nakamura, Hiroyuki Kamao, Sunao Sugita, Akishi Onishi, Tomoko Ito, Kanako Fujita, Shin Kawamata, Masahiro J Go, Chikara Shinohara, Ken-Ichiro Hata, Masanori Sawada, Midori Yamamoto, Sachiko Ohta, Yasuo Ohara, Kenichi Yoshida, Junko Kuwahara, Yuko Kitano, Naoki Amano, Masafumi Umekage, Fumiyo Kitaoka, Azusa Tanaka, Chihiro Okada, Naoko Takasu, Seishi Ogawa, Shinya Yamanaka, Masayo Takahashi
We assessed the feasibility of transplanting a sheet of retinal pigment epithelial (RPE) cells differentiated from induced pluripotent stem cells (iPSCs) in a patient with neovascular age-related macular degeneration. The iPSCs were generated from skin fibroblasts obtained from two patients with advanced neovascular age-related macular degeneration and were differentiated into RPE cells. The RPE cells and the iPSCs from which they were derived were subject to extensive testing. A surgery that included the removal of the neovascular membrane and transplantation of the autologous iPSC-derived RPE cell sheet under the retina was performed in one of the patients...
March 16, 2017: New England Journal of Medicine
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