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argon photocoagulation

Gülizar Demirok, Mehmet Fatih Kocamaz, Yasemin Topalak, Yeşim Altay, Burcu Tabakci, Ahmet Şengün
PURPOSE: To evaluate the changes in the macular ganglion cell complex (GCC) thickness and central macular thickness (CMT) as measured by spectral domain optical coherence tomography (OCT) post-argon laser panretinal photocoagulation (PRP). METHODS: The medical records of 25 patients with proliferative diabetic retinopathy (PDR) who underwent PRP, 29 patients with non-proliferative diabetic retinopathy (NPDR), and 29 patients with diabetes but without diabetic retinopathy (DR) were analyzed...
August 10, 2016: Seminars in Ophthalmology
Young Shin Kim, So-Young Jin, Jin Kwon Chung
OBJECTIVES: To describe the first case of Descemet membrane endothelial keratoplasty (DMEK) combined with argon laser photocoagulation and intracameral 5-fluorouracil (5-FU) injection in a patient with epithelial downgrowth after cataract surgery. METHODS: Case report and review of the literature. RESULTS: A 77-year-old female underwent uneventful cataract surgery using a clear corneal incision in her left eye. Six months after surgery, an epithelial cell sheet began to cover the posterior cornea and then spread to the anterior chamber structures, leading to anterior synechia and corectopia at 2 years...
September 7, 2016: Eye & Contact Lens
Moshe Ehrenberg, Scott Ehrenberg, Ouri Schwob, Ofra Benny
In today's modern pharmacologic approach to treating sight-threatening retinal vascular disorders, there is an increasing demand for a compact, mobile, lightweight and cost-effective fluorescein fundus camera to document the effects of antiangiogenic drugs on laser-induced choroidal neovascularization (CNV) in mice and other experimental animals. We have adapted the use of the Kowa Genesis Df Camera to perform Fundus Fluorescein Angiography (FFA) in mice. The 1 kg, 28 cm high camera has built-in barrier and exciter filters to allow digital FFA recording to a Compact Flash memory card...
July 2016: Experimental Eye Research
Emily L Hughes, Ian J Dooley, Kevin P Kennelly, Fergus Doyle, W F Siah, P Connell
PURPOSE: Symptomatic retinal arterial macroaneurysms (RAM) are primarily investigated by fundus fluorescein angiography after presenting with visual disturbance. The natural history includes spontaneous regression and occasionally occlusion of the arteriole distal to the aneurysm. RAM may be managed conservatively. Interventional treatment options include focal argon laser photocoagulation, Nd:YAG laser hyaloidotomy, and pars plana vitrectomy. The purpose of this study was to elicit the rates of distal vessel occlusion and aneurysm thrombosis in RAM at presentation, and their relevance to the treatment of RAM...
May 25, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
P Niederer, F Fankhauser
Photothermal treatment of tumors of the retina and choroid such as retinoblastomas, malignant melanomas, benign tumors as well as of vascular malformations can be performed by using laser radiation. A number of basic physical laws have to be taken into account in this procedure. Of particular importance thereby are: Arrhenius' law to approximate the kinetics of protein denaturation and photocoagulation, furthermore the electromagnetic radiation field, the distribution of both radiant and thermal energy induced in tumors and vascular structures, the influence of the wavelength and laser pulse duration (exposure time), as well as of the optical properties of the tissue...
September 14, 2016: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
Mohammad M Khater
AIM: To compare augmented therapy with argon laser and amniotic membrane graft (AMG) versus AMG and tissue debridement for resistant mycotic corneal ulcers. METHODS: This study included 40 cases of resistant fungal corneal ulcers in two groups. In one group, argon laser photocoagulation and AMG were done while AMG with tissue debridement was done as adjunctive therapy for the specific antifungal agents. RESULTS: Complete healing with no adverse effects was achieved in argon laser group in duration ranging from 2-3 weeks in all cases...
April 14, 2016: Seminars in Ophthalmology
Salvatore Perrone, Alberto Rossetti, Patrick Sportiello, Pierfrancesco Mirabelli, Pierangela Cimatti, Daniele Doro
PURPOSE: To report on the outcome of conventional therapy in patients with Coats' disease. METHODS: Retrospective analysis of the charts of thirteen patients with Coats' disease. RESULTS: Mean age of 9 male (70%) and 4 female (30%) patients was 17.7 (range, 5-33) years; one female had bilateral disease. Eleven eyes with retinal telangiectasia and exudation were treated with argon laser photocoagulation alone or photocoagulation associated with cryotherapy; the mean follow up was 32...
2016: Open Ophthalmology Journal
Mohamed M Mahgoub, Tamer A Macky
PURPOSE: The aim of this study was to compare the effect of panretinal photocoagulation for proliferative diabetic retinopathy (PDR) on diabetic macular edema (DME) using a Pascal® Photocoagulator (PP) or a conventional argon laser photocoagulator (CALP). METHODS: Eighty eyes with PDR and center-involving DME were randomized to PP or CALP. Both groups had baseline assessment of best-corrected visual acuity (BCVA) and were examined with optical coherence tomography and fluorescein angiography...
2016: Ophthalmologica. Journal International D'ophtalmologie
Mohammad M Khater, Mohammad S El-Shorbagy, Adel A Selima
AIM: To compare argon laser photocoagulation and intrastromal injection of voriconazole as adjunctive treatment modalities in cases of resistant mycotic corneal ulcers. METHODS: Two groups each of them included 20 cases of resistant mycotic corneal ulcers. Both groups treated with local and systemic specific antimicrobial drugs guided with culture and sensitivity results. In one group argon laser photocoagulation was used as an adjunctive therapy to the specific antifungal drugs and in the other group, intrastromal injection of voriconazole was done besides the specific antifungal drugs...
2016: International Journal of Ophthalmology
P Frezzotti, C Menicacci, S A Bagaglia, P Mittica, F Toto, I Motolese
BACKGROUND: It is generally accepted that dialysis may lower plasma osmolality at a faster rate than changes in ocular osmolality. This osmotic difference causes water to migrate from the plasma into the aqueous humor, increasing intraocular pressure. Certain authors have described IOP increase in patients with narrow angles. CASE PRESENTATION: Here we report a neovascular glaucoma patient who experienced a substantial increase in IOP associated with severe eye pain and blurred vision during sessions of dialysis...
2016: BMC Ophthalmology
Young Min Park, Ji-Eun Lee, Jong Soo Lee
This study reports the efficacy and safety of Pattern Scan Laser (PASCAL) photocoagulation in the removal of superficial conjunctival nevi. Superficial conjunctival nevi were removed from 10 eyes of 10 patients using PASCAL. The laser spots were 200 μm in size, and the power delivered ranged from 250 to 300 mW. The duration of the laser pulse was kept at the minimum needed for adequate lesion removal. The duration of the laser pulse administered to the patients varied from 100 to 200 ms. Complete removal of the conjunctival nevus was observed in all the patients after PASCAL photocoagulation...
July 2016: Lasers in Medical Science
Sunali Goyal, Valeriy V Lyzogubov, Omair Ali, Nalini S Bora, Sami H Uwaydat
BACKGROUND: To characterize the effect of ASA in mouse models of choroidal neovascularization (CNV) and retinal degeneration. METHODS: In- Vivo: Male C57BL/6 mice were given ASA in food or regular rodent diet. CNV was induced by argon laser photocoagulation. Subretinal injections of PEG-400 were administered to induce retinal degeneration. CNV size, laser spot area and mean intensity of VEGF in the laser injured zones was measured. In the PEG injected eyes the thickness of RPE and choroid was measured...
February 10, 2016: Clinical & Experimental Ophthalmology
Christoph Mitsch, Berthold Pemp, Katharina Kriechbaum, Matthias Bolz, Christoph Scholda, Ursula Schmidt-Erfurth
PURPOSE: To identify the effects of pan-retinal laser treatment on the integrity of neurosensory retinal layers. METHODS: Patients were examined with fluorescence angiography after a standardized examination for diabetic retinopathy and a peripapillary ring scan with spectral domain optical coherence tomography. A single-session pan-retinal photocoagulation was performed using the PASCAL pattern scanning argon laser applying a minimum of 1,500 spots. Optical coherence tomography was evaluated more than 6 months...
June 2016: Retina
Servet Cetinkaya, Nursen Oncel Acir, Yasemin Fatma Cetinkaya, Zeynep Dadaci, Halil İbrahim Yener, Faik Saglam
PURPOSE: To evaluate the outcomes and complications following phacoemulsification surgery in eyes with cataract and high myopia. METHODS: We retrospectively evaluated the data of 43 eyes of 28 consecutive patients (12 males, 16 females) with cataract and high myopia who had undergone phacoemulsification and intraocular lens (IOL) implantation. The mean [± standard deviation (range)] age of the patients was 59.20 ± 11.08 (39-77) years. RESULTS: The frequency of nuclear cataract was significantly higher than that of other cataract types (P=0...
September 2015: Arquivos Brasileiros de Oftalmologia
Kay Thi Myint, Soumendra Sahoo, Aung Win Thein, Soe Moe, Han Ni
BACKGROUND: Sickle cell disease includes a group of inherited haemoglobinopathies affecting multiple organs including the eyes. Some people with the disease develop ocular manifestations due to vaso-occlusion. Vision-threatening complications of sickle cell disease are mainly due to proliferative sickle retinopathy which is characterized by proliferation of new blood vessels. Laser photocoagulation is widely applicable in proliferative retinopathies such as proliferative sickle retinopathy and proliferative diabetic retinopathy...
2015: Cochrane Database of Systematic Reviews
Jong Chul Han, Young Kyo Kwun, Seok Ho Cho, Changwon Kee
BACKGROUND: To evaluate the long-term outcomes of Argon laser photocoagulation compared to surgical direct cyclopexy in small-size cyclodialysis cleft patients. METHODS: This is a retrospective study. Small-size cyclodialysis cleft patients who underwent Argon laser photocoagulation and surgical direct cyclopexy were reviewed. The mean follow-up period were 82.4 (range, 61 - 145) months and 99.9 (range, 62 - 184) months in both groups. The comparison of best corrected visual acuity (BCVA), intraocular pressure (IOP), postoperative peak IOP and time to normalization of IOP before and after the treatment...
2015: BMC Ophthalmology
Ahmad M Mansour, Issam Hamade, Rafic S Antonios
A 20-year-old woman, a registered nurse, presented with best-corrected visual acuity of 6/15 (20/50) due to bilateral extensive persistent pupillary membrane. Sequential argon laser photocoagulation of the iris strands at the pupillary membrane iris collarette followed by neodymium:YAG laser lysis resulted in partial clearing of the central visual axis without bleeding. Best-corrected visual acuity improved to 6/9 (20/30) bilaterally without complications noted 1 year after combined laser therapy.
2015: BMJ Case Reports
Pamela Royle, Hema Mistry, Peter Auguste, Deepson Shyangdan, Karoline Freeman, Noemi Lois, Norman Waugh
BACKGROUND: Diabetic retinopathy is an important cause of visual loss. Laser photocoagulation preserves vision in diabetic retinopathy but is currently used at the stage of proliferative diabetic retinopathy (PDR). OBJECTIVES: The primary aim was to assess the clinical effectiveness and cost-effectiveness of pan-retinal photocoagulation (PRP) given at the non-proliferative stage of diabetic retinopathy (NPDR) compared with waiting until the high-risk PDR (HR-PDR) stage was reached...
July 2015: Health Technology Assessment: HTA
Armelle Cahuzac, Claire Scemama, Martine Mauget-Faÿsse, José-Alain Sahel, Benjamin Wolff
PURPOSE: To describe clinical, angiographic, and tomographic features and the therapeutic management of patients with retinal arterial macroaneurysm (RAM). METHODS: Retrospective analysis of patients diagnosed with RAM between January 2011 and September 2014 in Professor Sahel's Department of Ophthalmology, Rothschild Foundation. Retinal arterial macroaneurysms were classified as hemorrhagic, exudative, or quiescent. Patient demographics and comorbidities were recorded...
January 2016: European Journal of Ophthalmology
Lasse Jørgensen Cehofski, Anders Kruse, Benedict Kjærgaard, Allan Stensballe, Bent Honoré, Henrik Vorum
Branch retinal vein occlusion induces complex biological processes in the retina that are generated by a multitude of interacting proteins. These proteins and their posttranslational modifications can effectively be studied using modern proteomic techniques. However, no method for studying large-scale protein changes following branch retinal vein occlusion has been available until now. Obtainment of retinal tissue exposed to branch retinal vein occlusion is only available through experimental animal models...
2015: Journal of Ophthalmology
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