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Glaucoma AND IOP

Seung Hoon Kim, Eun Jung Lee, Jong Chul Han, Sae Woon Sohn, Taekkwan Rhee, Changwon Kee
PURPOSE: To investigate whether diurnal fluctuation in intraocular pressure (IOP) can influence the result of the correlations between IOP-related factors and progression of normal tension glaucoma (NTG). METHODS: Glaucoma progression was defined as visual field (VF) progression and changes in the optic disc and/or retinal nerve fiber layer (RNFL). Two different methods were used to evaluate the impact of the diurnal fluctuation in IOP. 'Conventional method' used in previous studies included all IOP measurements during the follow up time...
2016: PloS One
Eri Nitta, Kazuyuki Hirooka, Takeru Shimazaki, Shino Sato, Kaori Ukegawa, Yuki Nakano, Akitaka Tsujikawa
PURPOSE: This study compared retinal vessel oxygen saturation before and after glaucoma surgery. METHODS: Retinal oxygen saturation in glaucoma patients was measured using a non-invasive spectrophotometric retinal oximeter. Adequate image quality was found in 49 of the 108 consecutive glaucoma patients recruited, with 30 undergoing trabeculectomy, 11 EX-PRESS and eight trabeculotomy. Retinal oxygen saturation measurements in the retinal arterioles and venules were performed at 1 day prior to and at approximately 10 days after surgery...
October 24, 2016: Acta Ophthalmologica
Matthew Osmond, Sarah M Bernier, Mina B Pantcheva, Melissa D Krebs
Glaucoma is a disease in which damage to the optic nerve leads to progressive, irreversible vision loss. The intraocular pressure (IOP) is the only modifiable risk factor for glaucoma and its lowering is considered a useful strategy for preventing or slowing down the progression of glaucomatous neuropathy. Elevated intraocular pressure associated with glaucoma is due to increased aqueous humor outflow resistance, primarily through the trabecular meshwork (TM) of the eye. Current in vitro models of the trabecular meshwork are oversimplified and do not capture the organized and complex three-dimensional nature of this tissue that consists primarily of collagen and glycoasaminoglycans...
October 24, 2016: Biotechnology and Bioengineering
C Gustavo De Moraes, Jeffrey M Liebmann, Leonard A Levin
Glaucomatous visual field progression has both personal and societal costs and therefore has a serious impact on quality of life. At the present time, intraocular pressure (IOP) is considered to be the most important modifiable risk factor for glaucoma onset and progression. Reduction of IOP has been repeatedly demonstrated to be an effective intervention across the spectrum of glaucoma, regardless of subtype or disease stage. In the setting of approval of IOP-lowering therapies, it is expected that effects on IOP will translate into benefits in long-term patient-reported outcomes...
October 20, 2016: Progress in Retinal and Eye Research
Boel Bengtsson, Anders Heijl
Purpose: We evaluate how visual fields are affected by the initiation of IOP-reducing therapy in previously untreated glaucoma individuals. Methods: Qualifying individuals with newly diagnosed glaucoma having normal to moderately elevated IOP were prospectively randomized either to IOP-reducing therapy or to no treatment. Before randomization, individuals underwent repeatedly Standard Automated Perimetry (SAP) testing and Goldmann tonometry. Three months after randomization, patients again underwent SAP and tonometry...
October 1, 2016: Investigative Ophthalmology & Visual Science
Si Hyung Lee, Eun Min Kang, Gyu Ah Kim, Seung Woo Kwak, Joon Mo Kim, Hyoung Won Bae, Gong Je Seong, Chan Yun Kim
BACKGROUND: To investigate the association between heavy metal levels and open-angle glaucoma (OAG) with low- and high-teen baseline intraocular pressure (IOP) using a population-based study design. METHODS: This cross-sectional study included 5,198 participants older than 19 years of age who participated in the Korean National Health and Nutrition Examination Survey (KNHANES) from 2008 to 2012 and had blood heavy metal levels available. The OAG with normal baseline IOP (IOP ≤ 21 mmHg) subjects were stratified into low-teen OAG (baseline IOP ≤ 15 mmHg) and high-teen OAG (15 mmHg < baseline IOP ≤ 21 mmHg), and the association between blood lead, mercury, and cadmium levels and glaucoma prevalence was assessed for low- and high-teen OAG...
2016: PloS One
Vujica Markovic, Dragan Vukovic, Aleksandra Radosavljevic, Ivan Marjanovic
PURPOSE: To investigate the possible association between acquired ectropion uveae and blunt trauma to the eye. We present 3 cases of acquired ectropion uveae that occurred after blunt trauma to the eye. There are no previously published data on possible association of these conditions. METHODS: A retrospective review was conducted of patients with ectropion uveae and eye injury at University Eye Hospital over a 10-year period (2006-2016). We analyzed medical records and clinical findings...
October 21, 2016: European Journal of Ophthalmology
Jong Chul Han, Young Hoon Hwang, Byung Heon Ahn
PURPOSE: To evaluate the safety and efficacy of a novel membrane-tube (MT)-type glaucoma shunt device for refractory glaucoma surgery. The device consists of an expanded polytetrafluoroethylene membranous reservoir, as well as a silicone tube (300-μm external and 200-μm internal diameter) with an intraluminal stent. We named the device "Finetube MT". METHODS: The Finetube MT was implanted into 44 glaucomatous eyes that had insufficient intraocular pressure (IOP) control despite medical treatment or previous trabeculectomy...
October 20, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
Katrin Lorenz, Sabine Beck, Munir M Keilani, Joanna Wasielica-Poslednik, Norbert Pfeiffer, Franz H Grus
BACKGROUND: The aim of our current investigation was to analyze the autoantibody -reactivities of patients after acute angle closure glaucoma (AACG) by means of a protein microarray approach to identify intraocular pressure (IOP)-dependent antibodies. METHODS: Collected sera from different study time points (AACG n = 6, 0, 2, 4 and 12 weeks) and control group (CTRL n = 11, 0 and 12 weeks) were analyzed. Protein-microarrays were incubated with sera and occurring immunoreactivities were visualized with fluorescence labeled anti-human-IgG antibodies...
October 18, 2016: Clinical & Experimental Ophthalmology
Cindy T Y Lam, Graham E Trope, Yvonne M Buys
PURPOSE: To measure the influence of body weight on postural intraocular pressure (IOP) changes and to determine if significant weight loss effects IOP. PATIENTS AND METHODS: In this prospective case-control study 25 morbidly obese subjects scheduled for bariatric surgery and 25 age-matched and sex-matched normal weight controls were recruited. Subjects had tonometry performed in 7 positions with the order randomized: sitting with the neck in neutral position, neck flexion at 30 degrees, extension at 30 degrees, supine, right, and left lateral decubitus, and with the head and upper body elevated at 30 degrees...
October 14, 2016: Journal of Glaucoma
Davinder S Grover, David G Godfrey, Oluwatosin Smith, Wei Shi, William J Feuer, Ronald L Fellman
PURPOSE: To report on outcomes of gonioscopy-assisted transluminal trabeculotomy (GATT) in eyes with prior incisional glaucoma surgery. PATIENTS AND METHODS: A retrospective review was performed for all patients who underwent a GATT procedure with a history of prior incisional glaucoma surgery. RESULTS: Thirty-five eyes of 35 patients were treated. The mean age was 67.7 years. Nineteen eyes had a prior trabeculectomy, 13 eyes had a prior glaucoma drainage device, 4 eyes had a prior trabectome, and 5 eyes had prior endocyclophotocoagulation...
October 6, 2016: Journal of Glaucoma
Mohammad Waheed El-Anwar, Mohammad Abdelhady, Hazem Saeed Amer, Manar A Ghali
Introduction Due to the close anatomical relationship between the paranasal sinuses and the orbit, involvement or injury of the orbit from paranasal sinuses procedures may occur. Objectives We aimed to study the early and delayed effect of endoscopic sinus surgery on intraocular pressure (IOP). Methods We included in the study 38 patients with chronic rhinosinusitis (CRS), undergoing FESS. We performed FESS with the standard anterior to posterior approach. We measured IOP at the same time one day before surgery as well as day 1 and 6 weeks after surgery...
October 2016: International Archives of Otorhinolaryngology
S Ajamil Rodanés, C García-Álvarez, M A Saornil Alvarez, F López-Lara, J M Frutos Baraja, M Quiñones
CLINICAL CASE: A 35-year-old male with unilateral ocular hypertension in the right eye (RE). Anterior segment examination of the RE showed a melanotic lesion. Intraocular pressure (IOP) was 40mmHg in RE. Gonioscopy revealed extension into the anterior chamber angle. Excisional biopsy was performed and consistent with iris melanoma and secondary melanomalytic glaucoma. Brachytherapy was performed as adjuvant therapy. DISCUSSION: In patients presenting with unilateral glaucoma and increased pigmentation in the trabecular meshwork, it is crucial to perform imaging studies...
October 13, 2016: Archivos de la Sociedad Española de Oftalmología
Y Shi, H Wang, J Yin, X Zhang, M Li, C Xin, X Chen, N Wang
PurposeTo report surgical outcomes of microcatheter-assisted trabeculotomy following failed angle surgeries, and compare those with no previous angle surgery, in primary congenital glaucoma (PCG).MethodsThe early postoperative (12 months) results of 42 eyes of 36 patients who underwent microcatheter-assisted trabeculotomy by single surgeon for PCG were retrospectively analyzed. Group 1, 20 eyes of 16 patients, had no previous angle surgery. Group 2, 22 eyes of 20 patients, had one or two previous failed angle surgeries...
October 14, 2016: Eye
Richard Lindstrom, Richard Lewis, Dana M Hornbeak, Lilit Voskanyan, Jane Ellen Giamporcaro, John Hovanesian, Steven Sarkisian
INTRODUCTION: The study objective was to evaluate the intraocular pressure (IOP) and medication-lowering effect of 2 second-generation trabecular micro-bypass stents in eyes with open-angle glaucoma (OAG) on one preoperative medication. METHODS: Fifty-seven qualified phakic eyes with OAG on 1 medication, preoperative medicated IOP of 18-30 mmHg, and preoperative unmedicated (post-washout) IOP of 22-38 mmHg underwent implantation of 2 second-generation trabecular micro-bypass stents in a standalone procedure...
October 13, 2016: Advances in Therapy
Ignacio Rodriguez-Una, Augusto Azuara-Blanco, Anthony J King
BACKGROUND: To evaluate the spectrum of glaucoma surgery and the post-operative follow-up regimes undertaken among glaucoma specialists in the United Kingdom. DESIGN: National survey. PARTICIPANTS: Seventy-five glaucoma specialists (consultants and fellows). METHODS: An eight-question survey was emailed to all glaucoma subspecialists members of the United Kingdom and Eire Glaucoma Society. MAIN OUTCOME MEASURES: Surgery undertaken, post-operative management, awareness of intervention tariff and handling of the follow-up burden generated through surgery...
October 11, 2016: Clinical & Experimental Ophthalmology
Noriaki Nagai
 The ophthalmic application of drugs is the primary route of administration for the therapy of glaucoma; however, in traditional formulations, only small amounts of the administered drug penetrate the cornea to reach the desired intraocular tissue due to corneal barriers. Recently, nanoparticulate drug delivery is expected as a technology to overcome the difficulties in delivering drugs across biological barriers (improvement of bioavailability). In this study, we attempted to establish a new method for preparing solid drug nanoparticles by using a bead mill and various additives, and succeeded in preparing a high quality dispersion containing drug nanoparticles...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
Fang Ko, Paul J Foster, Nicholas G Strouthidis, Yusrah Shweikh, Qi Yang, Charles A Reisman, Zaynah A Muthy, Usha Chakravarthy, Andrew J Lotery, Pearse A Keane, Adnan Tufail, Carlota M Grossi, Praveen J Patel
PURPOSE: To describe associations of ocular and systemic factors with retinal pigment epithelium (RPE)-Bruch's membrane (BM) complex thickness as measured by spectral-domain (SD) optical coherence tomography (OCT). DESIGN: Multisite community-based study. This research has been conducted using the UK Biobank Resource. PARTICIPANTS: Sixty-seven thousand three hundred eighteen people 40 to 69 years old received questionnaires, physical examination, and eye examination, including macular SD OCT...
October 6, 2016: Ophthalmology
Hsin-Hui Shen, Guei-Sheung Liu, Seong Hoong Chow, Jiang-Hui Wang, Zheng He, Christine Nguyen, Tsung-Wu Lin, Bang V Bui
Infrared (IR) spectroscopy has been used to quantify chemical and structural characteristics of a wide range of materials including biological tissues. In this study, we examined spatial changes in the chemical characteristics of rat retina in response to intraocular pressure (IOP) elevation using synchrotron infrared microscopy (SIRM), a non-destructive imaging approach. IOP elevation was induced by placing a suture around the eye of anaesthetised rats. Retinal sections were collected onto transparent CaF2 slides 10 days following IOP elevation...
2016: PloS One
Mahmood Nejabat, Fatemeh Heidary, Mohammad Reza Talebnejad, Ramin Salouti, Mohammad Hossein Nowroozzadeh, Masoumeh Masoumpour, Hamideh Mahdaviazad, Zahra Tajbakhsh, Maryam Keshtkar, Hossein Jamali, Mohammad Reza Khalili, Hossein Movahedan, Narges Roustaei, Reza Gharebaghi
INTRODUCTION: This study aimed to determine intraocular pressure (IOP) and central corneal thickness (CCT) measurements in healthy Persian children to find clinical reference values in this ethnicity. Additionally, we examined the possible relationship between these measurements. METHODS: This cross-sectional study included 262 eyes of 131 Persian primary school children between 6 and 13 years of age. All eyes were healthy and had no anterior or posterior segment abnormalities, corneal disease, or evidence of glaucoma...
October 5, 2016: Ophthalmology and Therapy
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