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Retina and vitreous

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https://www.readbyqxmd.com/read/29453727/floating-flap-of-internal-limiting-membrane-in-myopic-macular-hole-surgery
#1
Kenji Yamashiro, Eri Kinoshita-Nakano, Toru Ota, Yoko Jingami, Isao Nakata, Hisako Hayashi
PURPOSE: To evaluate the surgical results of macular hole (MH) in patients with high myopia treated with pars plana vitrectomy (PPV) leaving the internal limiting membrane (ILM) flap floating in vitreous fluid at the edge of the MH. METHODS: Nine highly myopic eyes with MH of nine consecutive patients who underwent PPV were retrospectively evaluated. Three eyes were accompanied by retinal detachment (RD). ILM peeling was performed around the MH and some part of the ILM flap was left attached to the edge of the MH...
February 16, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29449964/consequences-of-inadvertent-intravitreal-mitomycin-c-injection
#2
Ahmad Mirshahi, Alireza Lashay, Mohammad Reza Mehrabi Bahar, Mojtaba Abrishami
Background: Mitomycin C (MMC) as an alkylating agent is miscellaneous an antineoplastic, antibiotic and ophthalmic agent. Here we aim to report a case of inadvertent intravitreal MMC injection instead of Avastin in case of diabetic macular edema. Case presentation: A 53 years old woman was planned to receive intravitreal Avastin injection, but accidentally, 0.05 ml of MMC 0.2% was injected. Best corrected visual acuity (BCVA) was 20/160 before injection. After 2 days, patient was referred to a tertiary referral eye center...
2018: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/29443363/sheets-glide-assisted-intraocular-placement-of-the-argus-ii-retinal-prosthesis
#3
Avni P Finn, Lejla Vajzovic
BACKGROUND AND OBJECTIVE: As an increasing number of vitreoretinal surgeons are implanting retinal prosthesis devices, the need to share surgical techniques to ease implantation in challenging scenarios grows. The authors share a technique to aide in overcoming a challenge associated with uveal prolapse in a patient undergoing Argus II retinal prosthesis (Second Sight Medical Products, Sylmar, CA) implantation. PATIENTS AND METHODS: A surgical technique is discussed and demonstrated using a video (Video available at www...
February 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29439268/posterior-hyaloid-dissection-let-s-make-it-easy-with-blue
#4
Laura Sararols, Karim Bañon, Gabriel Londoño, Miguel Castilla, Mercé Guarro
PURPOSE: Our aim is to present in this online supplementa ry video (see www.karger.com/doi/10.1159/000486348) an easy new surgical technique using blue dye to dissect the posterior hyaloid when performing pars plana vitrectomy. PROCEDURES: Dual-Blue stain is injected in vitreous cavity just after central vitrectomy is performed. The distribution of the blue stain will allow us to know if there is a posterior vitreous detachment or not ("blue lake fashion" or "blue jelly fashion," respectively) and as an excellent visualization of the vitreous fibers is accomplished, dissection of the posterior hyaloid can be performed without difficulty...
February 13, 2018: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/29436656/early-quantitative-profiling-of-differential-retinal-protein-expression-in-lens-induced-myopia-in-guinea-pig-using-fluorescence-difference-two-dimensional-gel-electrophoresis
#5
Yi Wu, Carly Siu-Yin Lam, Dennis Yan-Yin Tse, Chi Ho To, Quan Liu, Sally A McFadden, Rachel Ka-Man Chun, King Kit Li, Jianfang Bian, Chuen Lam
The current study aimed to investigate the differential protein expression in guinea pig retinas in response to lens-induced myopia (LIM) before fully compensated eye growth. Four days old guinea pigs (n=5) were subjected to ‑4D LIM for 8 days. Refractive errors were measured before and at the end of the lens wear period. Ocular dimensions were also recorded using high‑frequency A‑scan ultrasonography. After the LIM treatment, retinas of both eyes were harvested and soluble proteins were extracted. Paired retinal protein expressions in each animal were profiled and compared using a sensitive fluorescence difference two‑dimensional gel electrophoresis...
February 8, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29432054/ocular-drug-distribution-and-safety-of-a-noninvasive-ocular-drug-delivery-system-of-dexamethasone-sodium-phosphate-in-rabbit
#6
Kongnara Papangkorn, John W Higuchi, Balbir Brar, William I Higuchi
PURPOSE: To determine the ocular toxicity, systemic exposure, and amounts of dexamethasone sodium phosphate (DSP) in ocular tissues after administration of DSP with the Visulex system (DSP-Visulex). METHODS: DSP-Visulex was applied onto healthy rabbit eyes. DSP concentrations (4%, 8%, 15%, and 25%) and treatment durations (5, 10, and 20 min) were evaluated for the amounts of DSP in the ocular tissues and in plasma after single administrations of DSP-Visulex. The drug in eye tissues and plasma was analyzed by high-performance liquid chromatography-UV/VIS and by liquid chromatography-mass spectrometry, respectively...
February 12, 2018: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29411099/vitrectomy-for-optic-disc-pit-maculopathy-a-long-term-follow-up-study
#7
Ferdinando Bottoni, Matteo Cereda, Roberta Secondi, Sara Bochicchio, Giovanni Staurenghi
PURPOSE: To evaluate the clinical outcomes of vitrectomy with induction of posterior vitreous detachment for the treatment of optic disc pit maculopathy. METHODS: We retrospectively evaluated medical records and imaging studies of 11 consecutive patients with optic disc pit maculopathy who underwent vitrectomy at Sacco University Hospital, Milan, Italy, between October 2008 and December 2015. Induction of a posterior vitreous detachment (PVD) was the aim of our surgery...
February 6, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29411009/nrf2-activation-is-a-potential-therapeutic-approach-to-attenuate-diabetic-retinopathy
#8
Devy Deliyanti, Saeed F Alrashdi, Sih Min Tan, Colin Meyer, Keith W Ward, Judy B de Haan, Jennifer L Wilkinson-Berka
Purpose: Oxidative stress is a causal factor in the development of diabetic retinopathy; however, clinically relevant strategies to treat the disease by augmenting antioxidant defense mechanisms have not been fully explored. We hypothesized that boosting nuclear factor erythroid-2-related factor 2 (Nrf2) antioxidant capacity with the novel Nrf2 activator dh404, would protect the retina in diabetes including vision-threatening breakdown of the blood-retinal barrier (BRB) and associated damage to macroglial Müller cells...
February 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29403587/ophthalmologic-findings-in-patients-with-neuro-metabolic-disorders
#9
Narjes Jafari, Karl Golnik, Mansoor Shahriari, Parvaneh Karimzadeh, Sayena Jabbehdari
Purpose: We aimed to present the ophthalmic manifestations of neuro-metabolic disorders. Methods: Patients who were diagnosed with neuro-metabolic disorders in the Neurology Department of Mofid Pediatric Hospital in Tehran, Iran, between 2004 and 2014 were included in this study. Disorders were confirmed using clinical findings, neuroimaging, laboratory data, and genomic analyses. All enrolled patients were assessed for ophthalmological abnormalities. Results: A total of 213 patients with 34 different neuro-metabolic disorders were included...
January 2018: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/29392308/pharmacokinetic-and-safety-evaluation-of-a-transscleral-sustained-unoprostone-release-device-in-monkey-eyes
#10
Nobuhiro Nagai, Shinji Yamada, Junichi Kawasaki, Eri Koyanagi, Saaya Saijo, Hirokazu Kaji, Matsuhiko Nishizawa, Toru Nakazawa, Toshiaki Abe
Purpose: We evaluate the ocular tissue distribution and retinal toxicity of unoprostone (UNO) during 12 months, after transscleral sustained-UNO administration using a drug delivery device in monkey eyes. Methods: The device consisted of a reservoir, controlled-release cover, and a drug formulation of photopolymerized polyethylene glycol dimethacrylate. Six mg UNO was loaded into the device (length, 17 mm; width, 4.4 mm; height, 1 mm). The concentrations of M1, a primary metabolite of UNO, in the retina, choroid, vitreous, lens, aqueous humor, iris, ciliary body, and plasma were determined by liquid chromatography-tandem mass spectrometry at 3, 6, and 12 months after implantation...
February 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29376221/relationship-between-pericytes-and-endothelial-cells-in-retinal-neovascularization-a-histological-and-immunofluorescent-study-of-retinal-angiogenesis
#11
Se Hyun Choi, Minhwan Chung, Sung Wook Park, Noo Li Jeon, Jeong Hun Kim, Young Suk Yu
PURPOSE: To evaluate the relationship between pericytes and endothelial cells in retinal neovascularization through histological and immunofluorescent studies. METHODS: C57BL/6J mice were exposed to hyperoxia from postnatal day (P) 7 to P12 and were returned to room air at P12 to induce a model of oxygen-induced retinopathy (OIR). The cross sections of enucleated eyes were processed with hematoxylin and eosin. Immunofluorescent staining of pericytes, endothelial cells, and N-cadherin was performed...
January 25, 2018: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/29374239/optimizing-oct-acquisition-parameters-for-assessments-of-vitreous-haze-for-application-in-uveitis
#12
G Montesano, C M Way, G Ometto, H Ibrahim, P R Jones, R Carmichael, X Liu, T Aslam, P A Keane, D P Crabb, A K Denniston
Detection and evaluation of inflammatory activity in uveitis is essential to the management of the condition, and yet continues to be largely dependent on subjective clinical measures. Optical coherence tomography (OCT) measurement of vitreous activity is an alternative to clinical vitreous haze scoring and has passed a number of early validation studies. In this study we aimed to evaluate the impact of 'operator factors' on the variability of the technique as part of the validation process, and to help evaluate its suitability for 'real world' use...
January 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29368001/pharmacokinetics-tissue-localization-toxicity-and-treatment-efficacy-in-the-first-small-animal-rabbit-model-of-intra-arterial-chemotherapy-for-retinoblastoma
#13
Anthony B Daniels, Michael T Froehler, Janene M Pierce, Amy H Nunnally, M Wade Calcutt, Thomas M Bridges, David C LaNeve, Phillip E Williams, Kelli L Boyd, Michelle L Reyzer, Craig W Lindsley, Debra L Friedman, Ann Richmond
Purpose: Current intra-arterial chemotherapy (IAC) drug regimens for retinoblastoma have ocular and vascular toxicities. No small-animal model of IAC exists to test drug efficacy and toxicity in vivo for IAC drug discovery. The purpose of this study was to develop a small-animal model of IAC and to analyze the ocular tissue penetration, distribution, pharmacokinetics, and treatment efficacy. Methods: Following selective ophthalmic artery (OA) catheterization, melphalan (0...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29359091/high-resolution-retinal-swept-source-optical-coherence-tomography-with-an-ultra-wideband-fourier-domain-mode-locked-laser-at-mhz-a-scan-rates
#14
Jan Philip Kolb, Tom Pfeiffer, Matthias Eibl, Hubertus Hakert, Robert Huber
We present a new 1060 nm Fourier domain mode locked laser (FDML laser) with a record 143 nm sweep bandwidth at 2∙ 417 kHz  =  834 kHz and 120 nm at 1.67 MHz, respectively. We show that not only the bandwidth alone, but also the shape of the spectrum is critical for the resulting axial resolution, because of the specific wavelength-dependent absorption of the vitreous. The theoretical limit of our setup lies at 5.9 µm axial resolution. In vivo MHz-OCT imaging of human retina is performed and the image quality is compared to the previous results acquired with 70 nm sweep range, as well as to existing spectral domain OCT data with 2...
January 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29356342/the-human-eye-proteome-project-updates-on-an-emerging-proteome
#15
REVIEW
Meleha T Ahmad, Pingbo Zhang, Craig Dufresne, Luigi Ferrucci, Richard D Semba
The human eye is a complex organ consisting of multiple compartments with unique and specialized properties that reflect their varied functions. Although there have been advancements in ocular imaging and therapeutics over the past decade, the pathogenesis of many common eye diseases remains poorly understood. Proteomics is an invaluable tool to gain insight into pathogenesis, diagnosis, and treatment of eye diseases. By 2013, when the Human Eye Proteome Project (also known as the EyeOme) was founded, there were 4,842 non-redundant proteins identified in the human eye...
January 22, 2018: Proteomics
https://www.readbyqxmd.com/read/29353344/safety-study-of-intravitreal-and-suprachoroidal-laponite-clay-in-rabbit-eyes
#16
Esther Prieto, Eugenio Vispe, Alba De Martino, Miriam Idoipe, María J Rodrigo, Elena Garcia-Martin, José M Fraile, Vicente Polo-Llorens, José A Mayoral
PURPOSE: To study the safety and biocompatibility of Laponite clay (LAP) within an intravitreal and suprachoroidal administration in rabbit eyes. METHODS: Thirty-two New Zealand albino rabbits were divided into two experimental groups to test intravitreal (IVT group) and suprachoroidal (SCS group) administration of a 100-μl and 50-μl Laponite suspension respectively. Following injection, the eyes were monitored by ocular tonometry, slit-lamp eye examination and indirect ophthalmoscopy, at 24 h, 1, 4, 12, and 14 weeks post administration...
January 20, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29344483/retinoinvasive-uveal-melanoma-report-of-2-cases-and-review-of-the-literature
#17
John P Gorham, Eszter Szalai, Jill R Wells, Hans E Grossniklaus
Purpose: To describe the clinical history and histopathologic findings of 2 cases of retinoinvasive uveal melanoma. Methods: The medical records and pathology specimens of 2 patients with retinoinvasive uveal melanoma were reviewed. Results: The first patient had an iris/ciliary body melanoma that was treated and the second patient had suspected iridocorneal endothelial syndrome. Both patients developed a blind, painful eye; the first patient's right eye was enucleated and the left eye of the second patient underwent evisceration...
November 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29343528/effect-of-intravitreal-triamcinolone-acetonide-injection-at-the-end-of-vitrectomy-for-vitreous-haemorrhage-related-to-proliferative-diabetic-retinopathy
#18
Yoshihiro Takamura, Masahiko Shimura, Takashi Katome, Hideaki Someya, Masahiko Sugimoto, Takao Hirano, Taiji Sakamoto, Makoto Gozawa, Takehiro Matsumura, Masaru Inatani
BACKGROUND/AIMS: To investigate whether intravitreal injection of triamcinolone acetonide (IVTA) combined with vitrectomy prevents postoperative inflammation in patients with vitreous haemorrhage (VH) due to proliferative diabetic retinopathy (PDR). METHODS: This prospective, multicentre, randomised study conducted at seven sites in Japan enrolled patients diagnosed as having VH following PDR. Patients underwent vitrectomy with (IVTA+VIT group) or without (VIT group) IVTA at the end of the surgery...
January 17, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29342438/vitreoretinal-complications-and-outcomes-in-92-eyes-undergoing-surgery-for-modified-osteo-odonto-keratoprosthesis-a-10-year-review
#19
Pukhraj Rishi, Ekta Rishi, Vishvesh Agarwal, Sridevi Nair, Geetha Iyer, Bhaskar Srinivasan, Shweta Agarwal
PURPOSE: To analyze vitreoretinal (VR) complications and treatment outcomes in eyes undergoing modified osteo-odonto-keratoprosthesis (OOKP) surgery. DESIGN: Retrospective case series. PARTICIPANTS: All patients who underwent modified OOKP (mOOKP) surgery at a tertiary eye-care center from March 2003 to February 2013 were included. METHODS: Medical records were reviewed for relevant medical history, best-corrected visual acuity (BCVA), slit-lamp examination, ultrasound scan, oral examination findings, and VR complications...
January 13, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29339088/retinal-neuronal-cell-loss-prevents-abnormal-retinal-vascular-growth-in-a-rat-model-of-retinopathy-of-prematurity
#20
Ayuki Nakano, Daiki Asano, Ryo Kondo, Asami Mori, Shiho Arima, Hiroko Ushikubo, Kenji Sakamoto, Tohru Nagamitsu, Kunio Ishii, Tsutomu Nakahara
A short-term blockade of the vascular endothelial growth factor (VEGF)-mediated pathway in neonatal rats results in formation of severe retinopathy of prematurity (ROP)-like retinal blood vessels. The present study aimed to examine the role of retinal neurons in the formation of abnormal retinal blood vessels. Newborn rats were treated subcutaneously with the VEGF receptor tyrosine kinase inhibitor, KRN633 (10 mg/kg), or its vehicle (0.5% methylcellulose in water) on postnatal day (P) 7 and P8. To induce excitotoxic loss of retinal neurons, N-methyl-D-aspartic acid (NMDA) was injected into the vitreous chamber of the eye on P9...
January 12, 2018: Experimental Eye Research
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