Liu J.,Marquette University |
Eye Tracking Research and Applications Symposium (ETRA) | Year: 2016
To develop a real-time pupil and Purkinje tracking system with sub-millisecond latency for eye motion compensation in high resolution ophthalmoscopes through steering two orthogonal optical scanners optically conjugate to rotation center of the eye. © 2016 Copyright held by the owner/author(s).
Oddone F.,Ophthalmology |
Lucenteforte E.,University of Florence |
Michelessi M.,Ophthalmology |
Rizzo S.,University of Florence |
And 3 more authors.
Ophthalmology | Year: 2016
Topic Macular parameters have been proposed as an alternative to retinal nerve fiber layer (RNFL) parameters to diagnose glaucoma. Comparing the diagnostic accuracy of macular parameters, specifically the ganglion cell complex (GCC) and ganglion cell inner plexiform layer (GCIPL), with the accuracy of RNFL parameters for detecting manifest glaucoma is important to guide clinical practice and future research. Methods Studies using spectral domain optical coherence tomography (SD OCT) and reporting macular parameters were included if they allowed the extraction of accuracy data for diagnosing manifest glaucoma, as confirmed with automated perimetry or a clinician's optic nerve head (ONH) assessment. Cross-sectional cohort studies and case-control studies were included. The QUADAS 2 tool was used to assess methodological quality. Only direct comparisons of macular versus RNFL parameters (i.e., in the same study) were conducted. Summary sensitivity and specificity of each macular or RNFL parameter were reported, and the relative diagnostic odds ratio (DOR) was calculated in hierarchical summary receiver operating characteristic (HSROC) models to compare them. Results Thirty-four studies investigated macular parameters using RTVue OCT (Optovue Inc., Fremont, CA) (19 studies, 3094 subjects), Cirrus OCT (Carl Zeiss Meditec Inc., Dublin, CA) (14 studies, 2164 subjects), or 3D Topcon OCT (Topcon, Inc., Tokyo, Japan) (4 studies, 522 subjects). Thirty-two of these studies allowed comparisons between macular and RNFL parameters. Studies generally reported sensitivities at fixed specificities, more commonly 0.90 or 0.95, with sensitivities of most best-performing parameters between 0.65 and 0.75. For all OCT devices, compared with RNFL parameters, macular parameters were similarly or slightly less accurate for detecting glaucoma at the highest reported specificity, which was confirmed in analyses at the lowest specificity. Included studies suffered from limitations, especially the case-control study design, which is known to overestimate accuracy. However, this flaw is less relevant as a source of bias in direct comparisons conducted within studies. Conclusions With the use of OCT, RNFL parameters are still preferable to macular parameters for diagnosing manifest glaucoma, but the differences are small. Because of high heterogeneity, direct comparative or randomized studies of OCT devices or OCT parameters and diagnostic strategies are essential. © 2016 American Academy of Ophthalmology.
Spiteri Cornish K.,University of Aberdeen |
Lois N.,Queen's University of Belfast |
Scott N.W.,University of Aberdeen |
Burr J.,University of St. Andrews |
And 6 more authors.
Ophthalmology | Year: 2014
Objective To determine whether internal limiting membrane (ILM) peeling improves anatomic and functional outcomes of full-thickness macular hole (FTMH) surgery when compared with the no-peeling technique. Design Systematic review and individual participant data (IPD) meta-analysis undertaken under the auspices of the Cochrane Eyes and Vision Group. Only randomized controlled trials (RCTs) were included. Participants and Controls Patients with idiopathic stage 2, 3, and 4 FTMH undergoing vitrectomy with or without ILM peeling. Intervention Macular hole surgery, including vitrectomy and gas endotamponade with or without ILM peeling. Main Outcome Measures Primary outcome was best-corrected distance visual acuity (BCdVA) at 6 months postoperatively. Secondary outcomes were BCdVA at 3 and 12 months; best-corrected near visual acuity (BCnVA) at 3, 6, and 12 months; primary (after a single surgery) and final (after >1 surgery) macular hole closure; need for additional surgical interventions; intraoperative and postoperative complications; patient-reported outcomes (PROs) (EuroQol-5D and Vision Function Questionnaire-25 scores at 6 months); and cost-effectiveness. Results Four RCTs were identified and included in the review. All RCTs were included in the meta-analysis; IPD were obtained from 3 of the 4 RCTs. No evidence of a difference in BCdVA at 6 months was detected (mean difference, -0.04; 95% confidence interval [CI], -0.12 to 0.03; P = 0.27); however, there was evidence of a difference in BCdVA at 3 months favoring ILM peeling (mean difference, -0.09; 95% CI, -0.17 to -0.02; P = 0.02). There was evidence of an effect favoring ILM peeling with regard to primary (odds ratio [OR], 9.27; 95% CI, 4.98-17.24; P < 0.00001) and final macular hole closure (OR, 3.99; 95% CI, 1.63-9.75; P = 0.02) and less requirement for additional surgery (OR, 0.11; 95% CI, 0.05-0.23; P < 0.00001), with no evidence of a difference between groups with regard to intraoperative or postoperative complications or PROs. The ILM peeling was found to be highly cost-effective. Conclusions Available evidence supports ILM peeling as the treatment of choice for patients with idiopathic stage 2, 3, and 4 FTMH. © 2014 by the American Academy of Ophthalmology.
Kapoor G.,Ophthalmology |
Vats D.P.,Ant Seg Microsurgeon |
Parihar J.K.S.,Army Hospital R and R
Medical Journal Armed Forces India | Year: 2013
Background: Development and standardization of computerized color vision testing as a replacement for Martin Lantern test. Non-randomized comparative trial. Methods: All candidates of SSB, Allahabad, reporting for SMB underwent color vision testing at the eye dept by computerized eye test and currently available tests. Results: All candidates were subjected to Ishihara chart testing and those found to be CP III were subjected to the confirmatory test on Martin Lantern and the Software. Candidates requiring CP I standards for eligibility were tested on the same on Martin Lantern and on the new software method. On comparison between the Standard Martin Lantern and the Software, the results were consistent and comparable with 82 patients testing CP I on the Martin Lantern and 81 on the software. Of the CP III patients, 253 tested positive on the Standard lantern test as compared to 251 on the software and of the CP IV group, 147 tested positive on the Standard lantern and 149 by the software method. Conclusion: It was found that the software replicated the existing Martin Lantern accurately and consistently. The Martin Lantern Software can be used as a replacement for existing old Lanterns which are not in production since the early 20th century.© 2012, Armed Forces Medical Services (AFMS). All rights reserved.
Gold D.R.,Ophthalmology |
Seminars in Neurology | Year: 2016
Dizziness and vertigo are among the most common symptoms to bring a patient to a neurologist. Because symptoms are often vague and imprecise, a systematic approach is essential. By categorizing vestibular disorders based on timing, triggers, and duration, as well as through focused oculomotor and vestibular examinations, the vast majority of neuro-otologic diagnoses can be made at the bedside. Here the authors discuss historical and examination pearls for the most common neuro-otologic disorders. © Thieme Medical Publishers333 Seventh Avenue, New York, NY 10001, USA.
Mihajlovic M.,Bul. Zorana Djindjica 81 |
Vlajkovic S.,Bul. Zorana Djindjica 81 |
Jovanovic P.,Ophthalmology |
Stefanovic V.,Bul. Zorana Djindjica 81
International Journal of Clinical and Experimental Pathology | Year: 2012
Primary mucosal melanomas arise from melanocytes located in mucosal membranes lining respiratory, gastrointestinal and urogenital tract. Although a majority of mucosal melanomas originate from the mucosa of the nasal cavity and accessory sinuses, oral cavity, anorectum, vulva and vagina, they can arise in almost any part of mucosal membranes. Most of mucosal melanomas occur in occult sites, which together with the lack of early and specific signs contribute to late diagnosis, and poor prognosis. Because of their rareness the knowledge about their pathogenesis and risk factors is insufficient, and also there are not well established protocols for staging and treatment of mucosal melanomas. Surgery is the mainstay of treatment, with trends toward more conservative treatment since radical surgery did not show an advantage for survival. Radiotherapy can provide better local control in some locations, but did not show improvement in survival. There is no effective systemic therapy for these aggressive tumors. Compared with cutaneous and ocular melanoma, mucosal melanomas have lowest percent of five-year survival. Recently revealed molecular changes underlying mucosal melanomas offer new hope for development of more effective systemic therapy for mucosal melanomas. Herein we presented a comprehensive review of various locations of primary melanoma along mucosal membranes, their epidemiological and clinical features, and treatment options. We also gave a short comparison of some characteristics of cutaneous and mucosal melanomas.
Chow S.-P.,Ophthalmology |
Nastri A.,Royal Melbourne Hospital |
Clinical and Experimental Ophthalmology | Year: 2010
Abstract: Inflammatory myofibroblastic tumour (IMT) is a rare distinctive neoplasm of intermediate biological potential with a predilection for the abdominopelvic region and lung of children and young adults. It is histologically composed of spindle cells (myofibroblasts) in a myxoid to collagenous stroma with a prominent inflammatory infiltrate composed primarily of plasma cells and lymphocytes. Its pathogenesis is controversial. Arising most commonly in the lungs, only two cases of histopathologically confirmed IMT originating from the infratemporal and pterygopalatine fossae have been documented in the literature. Neither had orbital involvement. We now report the first case of IMT originating from the infratemporal fossa with orbital extension in a previously well 31-year-old woman. The patient presented with a 5-month history of intermittent right-sided headaches, progressive trismus and right lower lid swelling. She then developed right proptosis, diplopia and paraesthesia in the ophthalmic and maxillary divisions of her trigeminal nerve. Magnetic resonance imaging showed a soft tissue mass occupying most of the right infratemporal fossa with extension into pterygopalatine fossa and orbit. Provisional diagnosis from an open biopsy was nodular fasciitis. She underwent surgical debulking of the infratemporal fossa and lateral orbit through a coronal and trans-oral approach with trans-zygomatic access via total zygomatic osteotomy. Review of intraoperative specimens revised the diagnosis to IMT. Further management included systemic corticosteroids and adjuvant radiotherapy. © 2010 The Authors. Journal compilation © 2010 Royal Australian and New Zealand College of Ophthalmologists.
Sato T.,Ophthalmology |
Ito M.,National Defense Medical College |
Ishida M.,Ophthalmology |
Investigative Ophthalmology and Visual Science | Year: 2010
PURPOSE. To investigate the phototoxicity of persistent indocyanine green (ICG) under continuous visible light illumination and to determine whether blocking peak absorbance wavelengths of ICG is cytoprotective. METHODS. Cultured quail Müller cells were exposed to 0 to 5 mg/mL ICG for 30 seconds or 10 minutes and then were cultured in a colorless medium for 24 hours with or without continuous fluorescent lamp illumination. Cells exposed to 5 mg/mL ICG for 10 minutes were cultured under illumination filtered through a dichroic mirror that blocks red to nearinfrared, green, or blue wavelengths. After microscopic observation, cell viability and cell death were evaluated. RESULTS. ICG exposure followed by illuminated culture induced severe morphologic changes in cells, significant reductions in cell viability, and increases in cell death from apoptosis compared with exposure to ICG or illumination alone or with no exposure. Although ICG exposure at higher concentrations caused cell damage in a dose- and time-dependent manner, an increase in cell viability was noted for cells exposed to lower ICG concentrations. Blocking red to near-infrared wavelengths prevented the decrease in cell viability and the increase in cell death in the culture exposed to ICG followed by illuminated culture. CONCLUSIONS. Continuous fluorescent lamp illumination enhanced the cytotoxicity of persistent ICG on Müller cells in a dose- and exposure time-dependent manner. Blocking peak absorbance wavelengths of ICG prevented photodynamic cytotoxicity of persistent ICG under continuous visible light illumination in vitro. This culture system could be used to study the mechanisms of prevention of unfavorable outcomes in ICG-assisted surgery. © Association for Research in Vision and Ophthalmology.
Klinische Monatsblatter fur Augenheilkunde | Year: 2013
Beta-blockers are among the most important groups of drugs for glaucoma therapy. The advantages of beta-blockers are a good efficacy in primary and secondary types of glaucoma, different dosages, clinical experiences over decades, easy use in combination with all other glaucoma drugs, and low costs. Timolol is the most frequently used drug in fixed glaucoma medications. In comparison with other glaucoma drugs, beta-blockers have the most severe systemic side effects and may interact with other systemic medication. © Georg Thieme Verlag KG Stuttgart - New York.
De Pinho Paes Barreto R.,Federal University of Rio de Janeiro |
Biancardi A.L.,Ophthalmology |
Salgueiro M.J.,Federal University of Rio de Janeiro
International Ophthalmology | Year: 2012
We describe a case of chronic conjunctivitis related to phthiriasis palpebrarum. A 36 year-old female presented with gradual pruritus and painless ocular hyperaemia over the previous 3 months. On examination, nasal pterygium, conjunctival hyperaemia, oedema, and mild hypertrophy of the palpebral margin were observed. A slit-lamp examination revealed numerous creamy oval structures approximately 1 mm in diameter localised in the middle area of the lashes, and bloody crusts and a semi-transparent deposit were present in the superior palpebral margin. Based on the observation of numerous nits at the base of the eyelashes and the ectoparasite in the palpebral margin, a diagnosis of phthiriasis palpebrarum was made. The patient was referred to an infectologist for evaluation of other sexually transmitted diseases and examination of other body areas. She was successfully treated with oral ivermectin, shampoo for ciliary hygiene and artificial tears. Other recommendations to avoid re-infestation were made, such as changing, washing and sterilising clothes, towels and sheets daily. This report emphasizes the importance of the correct diagnosis and management of this disease, considered as sexually transmitted. © 2012 Springer Science+Business Media B.V.