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https://www.readbyqxmd.com/read/28425224/nanocarrier-mediated-retinal-drug-delivery-overcoming-ocular-barriers-to-treat-posterior-eye-diseases
#1
REVIEW
Rohit Bisht, Abhirup Mandal, Jagdish K Jaiswal, Ilva D Rupenthal
Effective drug delivery to the retina still remains a challenge due to ocular elimination mechanisms and complex barriers that selectively limit the entry of drugs into the eye. To overcome these barriers, frequent intravitreal injections are currently used to achieve high drug concentrations in vitreous and retina. However, these repetitive injections may result in several side effects. Recent advancements in the field of nanoparticle-based drug delivery could overcome some of these unmet needs and various preclinical studies conducted to date have demonstrated promising results of nanotherapies in the treatment of retinal diseases...
April 20, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28419404/use-of-evicel-fibrin-sealant-in-optic-disc-pit-associated-macular-detachment
#2
Paulo Ricardo Chaves de Oliveira, Alan Richard Berger, David Robert Chow
Optic disc pit is a rare congenital anomaly of the optic nerve. Retinal detachment is a common complication with poor outcomes. Many surgical alternatives have been described for the treatment of this condition, producing variable results. Herein, the authors describe four cases of optic disc pit-associated macular detachment managed with pars plana vitrectomy, fluid-air exchange, drainage of subretinal fluid through the optic disc pit, temporal peripapillary laser, and application of Evicel fibrin sealant (human) (Ethicon, Bridgewater, NJ) over the optic disc head...
April 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28412066/ranibizumab-injection-as-primary-treatment-in-patients-with-retinopathy-of-prematurity-anatomic-outcomes-and-influencing-factors
#3
Qiujing Huang, Qi Zhang, Ping Fei, Yu Xu, Jiao Lyu, Xunda Ji, Jie Peng, Yi-An Li, Peiquan Zhao
PURPOSE: To investigate the anatomic outcomes and influencing factors of ranibizumab in the treatment of retinopathy of prematurity (ROP). DESIGN: Retrospective case series. PARTICIPANTS: A total of 283 eyes of 145 patients with type 1 ROP treated with intravitreal injection of ranibizumab (IVR) as primary treatment. METHODS: Retrospective review of infants who were diagnosed with type 1 ROP and accepted IVR (0.25 mg/0...
April 12, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28351053/macular-edema-rationale-for-therapy
#4
Thomas J Wolfensberger
Macular edema represents the end-stage of multiple pathophysiological pathways in a multitude of ocular vascular, inflammatory, and other diseases. The rationale for clinical treatment of macular edema is based on the understanding and the inhibition of these pathophysiological mechanisms. When macular edema is caused by a generalized health problem such as diabetes, high blood pressure, or generalized inflammatory conditions, treatment of these generalized diseases can in many cases cure macular edema directly...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28349647/finite-element-modeling-validation-and-parametric-investigations-of-a-retinal-reattachment-stent
#5
Razvan Rusovici, Dennis Dalli, Kunal Mitra, Gary Ganiban, Michael Grace, Rudy Mazzocchi, Michael Calhoun
A new retinal reattachment surgical procedure is based on a stent which is deployed to press the retina back in place. An eye-stent finite element model studied the strain induced by the stent on retina. FEM simulations were performed for several stent geometric configurations (number of loops, wire diameter, intraocular pressure). The FEM was validated against experiment. Parametric studies demonstrated that stents could be successfully designed so that the maximum strain would be below permanent damage strain threshold of 2%...
March 27, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28337066/paintball-related-ocular-injuries-first-case-report-in-saudi-patients
#6
Mohammad Al-Amry, Huda Al-Ghadeer
Paintball is a popular recreational sport. This case series describes three Saudi patients exposed to paintball ocular injuries with sever ocular trauma. Two patients developed hyphema and traumatic cataract and one patient had vitreous hemorrhage, choroidal detachment, commotio retinae and retinal tear. All patients require surgical intervention. Final best corrected visual acuity was 20/200, 20/30 and 20/50 respectively. Paintball related ocular injuries can result in severe visual loss and in most of the time requires surgical intervention...
January 2017: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28306625/visualization-of-the-retina-and-vitreous-during-vitreoretinal-surgery-new-technologies
#7
REVIEW
Sarah P Read, Jorge A Fortun
PURPOSE OF REVIEW: Visualization remains a critical factor in successful ocular surgery.Here we review new technology that has the potential to allow for safer and more efficient retinal surgery. RECENT FINDINGS: Vitreoretinal surgery poses unique visualization challenges such as the need for specialized optical systems and the delicate and microscopic features of retinal structures. Better retinal visualization allows for new approaches to increasingly complex retinal cases...
May 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28299000/chorioretinal-coloboma-complications-retinal-detachment-and-choroidal-neovascular-membrane
#8
Rehan M Hussain, Ashkan M Abbey, Ankoor R Shah, Kimberly A Drenser, Michael T Trese, Antonio Capone
PURPOSE: To report the chorioretinal coloboma, and its association with increased risk of retinal detachment (RD) and choroidal neovascularization (CNV). METHODS: This retrospective case series included eyes with chorioretinal coloboma diagnosed between 1995 and 2014 with a focus on RD and CNV as related complications. Cases of CNV were managed with laser photocoagulation or intravitreal injection of bevacizumab. For eyes with CNV, therapeutic success was defined as resolution of the subretinal hemorrhage on fundus examination and resolution of the subretinal and intraretinal fluid on optical coherence tomography (OCT)...
January 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28297040/repair-of-total-tractional-retinal-detachment-in-norrie-disease-report-of-technique-and-successful-surgical-outcome
#9
Bozho Todorich, Aristomenis Thanos, Yoshihiro Yonekawa, Antonio Capone
Norrie disease is a rare, but devastating cause of pediatric retinal detachment, universally portending a poor visual prognosis. This paper describes successful surgical management of an infant with total retinal detachment associated with Norrie disease mutation. The infant was a full-term white male who presented with bilateral total funnel retinal detachments (RDs). He underwent genetic testing, which demonstrated single-point mutation 133 G>A transition in exon 2 of the NDP gene. The retinal detachment was managed with translimbal iridectomy, lensectomy, capsulectomy, and vitrectomy...
March 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28297038/scleral-autograft-for-optic-nerve-head-pit-associated-chronic-maculopathy
#10
Parag K Shah, Smita S Karandikar, Venkatapathy Narendran
Chronic macular edema is a common finding seen in optic nerve head pits. There is no universally accepted modality present for this condition. Herein, the authors describe a novel surgical technique where a scleral autograft is used to plug the optic pit after microincision vitreous surgery. [Ophthalmic Surg Lasers Imaging Retina. 2017;48:251-254.].
March 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28297033/microscope-integrated-oct-feasibility-and-utility-with-the-enfocus-system-in-the-discover-study
#11
Anne Runkle, Sunil K Srivastava, Justis P Ehlers
BACKGROUND AND OBJECTIVE: To evaluate the feasibility and utility of a novel microscope-integrated intraoperative optical coherence tomography (OCT) system. PATIENTS AND METHODS: The DISCOVER study is an investigational device study evaluating microscope-integrated intraoperative OCT systems for ophthalmic surgery. This report focuses on subjects imaged with the EnFocus prototype system (Leica Microsystems/Bioptigen, Morrisville, NC). OCT was performed at surgeon-directed milestones...
March 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28295944/paracentral-acute-middle-maculopathy-as-a-finding-in-patients-with-severe-vision-loss-following-phacoemulsification-cataract-surgery
#12
Katarina Creese, Daini Ong, Sukhpal S Sandhu, David Ware, C Alex Harper, Salmaan H Al-Qureshi, Sanjeewa S Wickremasinghe
IMPORTANCE: Paracentral acute middle maculopathy (PAMM) as diagnosed by spectral domain optical coherence tomography (SD-OCT) may be associated with "patch off" visual loss post cataract surgery. BACKGROUND: To report a case series of severe vision loss due to PAMM after cataract surgery DESIGN: Retrospective case series. PARTICIPANTS: Cases from five surgical centres (public and private) in Victoria, Australia. METHODS: Retrospective analysis of cases with unexplained "patch-off" vision loss post cataract surgery...
March 13, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28291461/corneal-and-corneoscleral-injury-in-combat-ocular-trauma-from-operations-iraqi-freedom-and-enduring-freedom
#13
Anton Vlasov, Denise S Ryan, Spencer Ludlow, Andrew Coggin, Eric D Weichel, Richard D Stutzman, Kraig S Bower, Marcus H Colyer
OBJECTIVES: To examine the incidence and the etiology of corneal and corneoscleral injuries in the setting of combat ocular trauma, and to determine what effect these injuries have on overall visual impairment from combat ocular trauma. METHODS: Retrospective, noncomparative, interventional case series, analyzing U.S. service members who were evacuated to the former Walter Reed Army Medical Center (WRAMC). Primary outcome measures were types of corneal injuries, length of follow-up at WRAMC, globe survival, and anatomical causes of blindness...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28289950/heavy-and-standard-silicone-oil-intraocular-inflammation
#14
REVIEW
Andrea Russo, Francesco Morescalchi, Simone Donati, Elena Gambicorti, Claudio Azzolini, Ciro Costagliola, Francesco Semeraro
PURPOSE: Proliferative vitreoretinopathy in the inferior retina remains clinically challenging. Heavier-than-water intraocular tamponades have been developed to improve inferior tamponading properties, and their chemical compositions have been substantially improved over the years, in parallel with developments in vitrectomy instrumentation and surgical techniques. Herein we present an updated review of the clinical use of standard formulations and HSO, focusing on analysis of the intraocular inflammation associated with endotamponade agents, and comparison of the adverse effects of these agents on the physical and biological properties of the eye...
March 13, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28282068/surgical-treatment-and-optical-coherence-tomographic-evaluation-for-accidental-laser-induced-full-thickness-macular-holes
#15
Y Qi, Y Wang, Q You, F Tsai, W Liu
PurposeTo report OCT appearance and surgical outcomes of full-thickness macular holes (MHs) accidentally caused by laser devices.Patients and methodsThis retrospective case series included 11 eyes of 11 patients with laser-induced MHs treated by pars plana vitrectomy, internal limiting membrane (ILM) peeling, and gas or silicone oil tamponade. Evaluations included a full ophthalmic examination, macular spectral-domain optical coherence tomography (SD-OCT), and fundus photography. Main outcome measures is MH closure and final visual acuity; the secondary outcome was the changes of retinal pigment epithelium and photoreceptor layer evaluated by sequential post-operative SD-OCT images...
March 10, 2017: Eye
https://www.readbyqxmd.com/read/28263029/feasibility-of-a-polyethylene-glycol-derivative-polymer-as-retinal-patch-to-seal-retinal-breaks-during-vitrectomy-for-rhegmatogenous-retinal-detachment-a-prospective-in-vivo-pilot-study-in-a-porcine-model
#16
Jean Pierre Hubschman, Andrea Govetto, Matthew Farajzadeh, Tatsuhiko Sato, Syed Askari, Ben Glasgow
BACKGROUND: This is a pilot study to test a polyethylene glycol (PEG) derived polymer used as a retinal patch to seal retinal breaks during pars plana vitrectomy (PPV) in the treatment of rhegmatogenous retinal detachment (RRD) in a porcine model. METHODS: Sixteen eyes from 8 pigs were assigned to 2 study groups (12 eyes) and one control group (4 eyes). In all study groups the polymer was used in-vivo, during PPV, to seal the break of a surgically induced RRD. Eyes in study groups were partially or completely filled with balanced saline solution at the end of the surgery...
March 6, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28243608/visual-acuity-retinal-sensitivity-and-macular-thickness-changes-in-diabetic-patients-without-diabetic-retinopathy-after-cataract-surgery
#17
Spela Stunf Pukl, Nataša Vidović Valentinčič, Mojca Urbančič, Irena Irman Grčar, Rok Grčar, Vladimir Pfeifer, Mojca Globočnik Petrovič
Aim. Functional and morphological macular study after cataract surgery in a group of diabetics without diabetic retinopathy compared to nondiabetics to evaluate the effect of surgical oxidative stress on diabetic retina. Methods. Prospective, comparative study. Preoperative eye exam, best corrected visual acuity (BCVA) measured by ETDRS letters, and optical coherence tomography (OCT) were followed by standard cataract surgery. The follow-up visits at 1, 3, and 6 months postoperatively included BCVA, OCT, and microperimetry, to analyze changes within and between the groups...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28221293/orbital-emphysema-as-a-rare-complication-of-retina-surgery
#18
Lourdes Rodríguez-Cabrera, José L Rodríguez-Loaiza, José L Tovilla-Canales, Francisca Zuazo
Three patients with a history of previous pars-plana vitrectomy, 2 of them with perfluoropropane, and 1 with sulfur hexafluoride used, experienced eyelid swelling and pain after travelling to a higher altitude city. Gas was found in the orbit and periocular tissues, causing orbital compartment syndrome in 2 of the patients. The gas persisted on these patients despite surgical intervention, so hyperbaric oxygen therapy was advised. One patient refused, the other patient responded well to this therapy and the gas disappeared...
February 17, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28221260/double-arcuate-relaxing-retinotomy-for-a-large-macular-hole
#19
Murat Karacorlu, Isil Sayman Muslubas, Mumin Hocaoglu, Serra Arf, Mehmet Giray Ersoz
PURPOSE: To describe double arcuate relaxing retinotomy as an alternative surgical technique in a case with a secondary large macular hole. METHODS: The management of a patient who developed a large macular hole and macular tractional rhegmatogenous retinal detachment after pars plana vitrectomy for proliferative diabetic retinopathy was retrospectively assessed. Despite surgical procedures, such as dissection of a preretinal membrane from the retina and peeling of the retinal internal limiting membrane, the macular hole could not be closed...
February 17, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28220252/long-term-surgical-outcomes-of-the-inverted-internal-limiting-membrane-flap-technique-in-highly-myopic-macular-hole-retinal-detachment
#20
Taiga Kinoshita, Yasutaka Onoda, Takatoshi Maeno
BACKGROUND: Pars plana vitrectomy (PPV) procedures are used for the surgical treatment of macular hole retinal detachment (MHRD) associated with high myopia. Re-detachment of the retina has been reported in MHRD associated with high myopia. Our aim was to evaluate the 1-year outcomes of vitrectomy, performed using an inverted internal limiting membrane (ILM) flap technique with gas tamponade, in five cases of MHRD associated with high myopia. METHODS: We performed a retrospective review of medical records of five consecutive cases of highly myopic MHRD...
February 20, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
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