1. Articles in category: Ophthalmology

    11329-11352 of 11631 « 1 2 ... 470 471 472 473 474 475 476 ... 483 484 485 »
    1. Activity of neovascular lesions treated with bevacizumab: comparison between optical coherence tomography and fluorescein angiography

      Abstract Purpose  To investigate whether examination with the non-invasive optical coherence tomography (OCT) alone is sufficient to ascertain the need of re-treatment with bevacizumab for exudative age-related macular degeneration (AMD) or the invasive fluorescein angiography (FA) is needed. Method  Two independent examiners reviewed FA and OCT images and performed a semi-quantitative assessment from 0=no activity to activity 1–3, mild, moderate and advanced, respectively. Weighted Kappa indices were performed to calculate the concordance between OCT and FA. Results  A total of 153 OCT and FA examinations of 69 patients were evaluated, mean 2.2 examinations per patient. The mean ...

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    2. Central corneal thickness in adult Chinese. Association with ocular and general parameters. The Beijing Eye Study

      Abstract Background  To evaluate the distribution of central corneal thickness and its associations in the adult Chinese population. Methods  The Beijing Eye Study 2006 is a population-based study including 3,251 (73.3%) subjects (aged 45+ years) out of 4,439 subjects who participated in the survey in 2001 and who returned for re-examination. Central corneal thickness (CCT) measurements were performed by slit lamp-based optical coherence tomography. Results  Central corneal thickness measurement data were available for 3,100 (95.4%) subjects. Mean CCT was 556.2±33.1 μm (median: 553 μm; range: 429–688 μm). In multiple regression analysis ...
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    3. Intraocular bevacizumab for macular edema due to Crvo. A multifocal-ERG and OCT study

      Abstract   Purpose To evaluate by multifocal electroretinography (MFERG) and optical coherence tomography (OCT) the effectiveness of intravitreal use of bevacizumab (Avastin) in the treatment of macular edema due to central retinal vein occlusion (CRVO). Methods A total of 10 eyes of 10 patients (six males and four females) with macular edema due to CRVO were studied before and after intravitreal use of bevacizumab with MFERG and OCT. The post treatment follow-up was 3 months. Examination included measurement of best-corrected visual acuity (BCVA) for distance, measurement of intraocular pressure (IOP), fluorescein angiography, foveal-retinal thickness measurement by OCT, and MFERG recordings before ...
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    4. John Moore Appointed to Staar Surgical Board Of Directors

      Ophthalmic Medical Device Industry Veteran Joins STAAR Board MONROVIA, Calif., Jan. 14 (HSMN NewsFeed) -- STAAR Surgical Company (Nasdaq: STAA ), a leading developer, manufacturer and marketer of minimally invasive ophthalmic products, today announced... Devices, Ophthalmology, PersonnelSTAAR Surgical
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    5. Comparison of Optic Disc Margin Identified by Color Disc Photography and High-Speed Ultrahigh-Resolution Optical Coherence Tomography

      Objective  To determine the correspondence between optic disc margins evaluated using disc photography (DP) and optical coherence tomography (OCT). Methods  From May 1, 2005, through November 10, 2005, 17 healthy volunteers (17 eyes) had raster scans (180 frames, 501 samplings per frame) centered on the optic disc taken with stereo-optic DP and high-speed ultrahigh-resolution OCT (hsUHR-OCT). Two image outputs were derived from the hsUHR-OCT data set: an en face hsUHR-OCT fundus image and a set of 180 frames of cross-sectional images. Three ophthalmologists independently and in a masked, randomized fashion marked the disc margin on the DP, hsUHR-OCT fundus, and ...
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    6. Prevalence Of Cystoid Macular Edema And Stability In Oct Retinal Thickness In Eyes With Retinitis Pigmentosa During A 48-Week Lutein Trial.

      The authors describe the prevalence of cystoid macular edema (CME), the variation in foveal thickness over a 48-week period, the correlation of visual acuity with retinal thickness, and the lack of response of CME to lutein administration in patients with moderately advanced retinitis pigmentosa (RP) participating in a randomized clinical trial of lutein supplementation.Page: 103DOI: 10.1097/IAE.0b013e31809862aaAuthors: ADACKAPARA, CHERYL A. BA *; SUNNESS, JANET S. MD +; DIBERNARDO, CATHY W. RN, RD, MS *; MELIA, B MICHELE ScM ++; DAGNELIE, GISLIN PhD *
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    7. Central Serous Chorioretinopathy In Patients With Keratoconus.

      The authors observed central serous chorioretinopathy in three individuals with keratoconus and discuss the possible connection between these two conditions.Page: 94DOI: 10.1097/IAE.0b013e3180986299Authors: EANDI, CHIARA M. MD, PhD *+; DEL PRIORE, LUCIAN V. MD, PhD *++; BERTELLI, ENRICO MD *; OBER, MICHAEL D. MD *; YANNUZZI, LAWRENCE A. MD *++
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    8. Optic neuritis and multiple sclerosis.

      Related Articles Optic neuritis and multiple sclerosis. Curr Opin Neurol. 2008 Feb;21(1):16-21 Authors: Plant GT PURPOSE OF REVIEW: To discuss recent neuro-ophthalmic advances relevant to the management of optic neuritis and multiple sclerosis. RECENT FINDINGS: Major advances have occurred in the fields of autoimmunity in optic neuritis, and in imaging the retinal nerve fibre layer in both optic neuritis and multiple sclerosis. SUMMARY: A proportion of cases of optic neuritis occur in patients who do not develop multiple sclerosis; the optic neuritis may be monophasic illness or recurrent. In many recurrent cases who also have myelitis (neuromyelitis ...
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    9. Incision construction, architecture fight infection

      Incision construction, architecture fight infection
      Among many factors surgeons cite to prevent clear corneal cataract surgery infection, wound construction and architecture are ‘primary’ ataract surgeons should focus on wound construction and architecture when working to avoid infections among their patients. A special focus on that area of surgery is credited by two senior surgeons as the main reason they have avoided infections for many years. More surgeons have focused on infection avoidance as some data have indicated an increasing rate of e
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    10. Optical Coherence Tomography Findings In Alport Syndrome.

      Three cases of Alport syndrome with atypical optical coherence tomography findings in the macular area, one of which had progressive enlargement of macular holes in both eyes, are presented.Page: 47DOI: 10.1097/01.iae.0000247169.26035.cdAuthors: Navarro, Rafael MD *+; Casaroli-Marano, Ricardo MD +; Mateo, Carlos MD *; Gris, Oscar MD *+; Adan, Alfredo MD *+; Corcostegui, Borja MD *
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    11. Polypoidal Choroidal Vasculopathy Associated With Tilted Disk Syndrome.

      The authors describe a case that illustrates a complication of tilted disk syndrome: serous macular detachment secondary to polypoidal choroidal neovascularization. The polypoidal choroidal vasculopathy was diagnosed by indocyanine green angiography and treated successfully with photodynamic therapy.Page: 31DOI: 10.1097/01.iae.0000243064.91851.78Authors: Peiretti, Enrico *+; Iranmanesh, Reza +; Yannuzzi, Lawrence A. +; Fossarello, Maurizio *
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    12. Treatment of retinal detachment

      An apparatus and minimally invasive method for removing fluid from a subretinal space to allow a detached retina to flatten. An apparatus, comprising a fluid withdrawal device and a guide for advancing and placing the device, is positioned on the exterior eye surface at the detachment site. Various embodiments of the apparatus are disclosed. Using the guide, the surgeon advances the device into the fluid-filled space and drains fluid, allowing the retina to flatten. Additional injection of saline or gas into the vitreous cavity normalizes intraocular pressure, and the patient is ambulatory immediately afterward. Unlike other retinal attachment techniques, in ...
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      Mentions: Gholam A. Peyman
    13. New treatment options for diffuse diabetic macular edema

      (Article in German) Summary  WHO reports let assume that 180 million people suffer from diabetes worldwide. Diabetic macular edema is the most common cause of visual deterioration in these patients. Factors for the development of a diabetic macular edema are the duration of the disease, age at onset and general factors, which give evidence for the heaviness of the disease. Focal macular edema responds well to focal laser treatment whereas diffuse edema often persists despite modified grid laser treatment. For these eyes several new treatment options were evaluated during the last years. Since OCT investigations became more and more popular ...
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    14. Does papillo-vitreal traction promote the progression of optic atrophy?

      Summary  BACKGROUND: In the course of posterior vitreal detachment the complications of macular and peripheral vitreal traction strands are well described in literature. However papillovitreal traction strands can damage the retinal nerve fiber layer at the optic nerve head, affecting the course of optic atrophy by exerting forces of tension and elongation. PATIENTS AND METHODS: A 78 years old patient suffers from optic atrophy on the left eye with regular intraocular pressure. Reading visual acuity and visual field outcomes are decreasing constantly over two years now. Clinical findings and optic coherence tomography (OCT) examinations show considerable papillovitreal traction strands in ...

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    15. Clinical electrophysiology in quinine induced retinal toxicity.

      Clinical electrophysiology in quinine induced retinal toxicity. Optom Vis Sci. 2008 Jan;85(1):17-26 Authors: Verdon W A 43-year-old woman was evaluated 9 months after a deliberate overdose of quinine. The patient's visual acuity was 20/20, but she had lost all peripheral vision beyond approximately 30 degrees eccentricity. The multifocal electroretinography (mfERG) and optical coherence tomography are described for the first time in this condition. The mfERG shows electronegative waveforms beyond 6 degrees . The mfERG response density is reduced at all retinal locations. Optical coherence tomography shows thinning of the middle and inner retina by 25 to ...
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    16. Intravitreal Colchicine Causes Decreased RNFL Birefringence without Altering RNFL Thickness.

      PURPOSE: To test the hypothesis that longitudinal differences between retinal nerve fiber layer (RNFL) birefringence, measured by scanning laser polarimetry (SLP), and RNFL thickness, measured by optical coherence tomography (OCT), are informative about the state of axonal degeneration. METHODS: Colchicine was injected into the vitreous cavity of one eye in each of six vervet monkeys (Chlorocebus sabaeus; estimated vitreal concentration: 1 mM, n = 3; 2 mM, n = 1; 10 mM, n = 2); an equivalent volume (approximately 0.1 mL) of sterile saline was injected into fellow control eyes. RNFL birefringence was measured by SLP before injection and every 10 minutes ...
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    17. Still evolving, OCT technology has revolutionized diagnostics

      Still evolving, OCT technology has revolutionized diagnostics
      Since the early 1990s, optical coherence tomography has revolutionized the way retinal and glaucoma surgeons approach diagnostics in their practices, and it continues to show promise for additional applications. When the technology for optical coherence tomography (OCT) was first developed in 1991, surgeons were impressed by the precise imaging created by this modality but questioned if it would become clinically indispensable. Now, many cannot imagine their practices without it. “At first I was
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    18. Anterior Segment Optical Coherence Tomography (Book)

      Anterior Segment Optical Coherence Tomography (Book)
      High-speed anterior segment optical coherence tomography (OCT) offers a non-contact method for high resolution cross-sectional and three-dimensional imaging of the cornea and the anterior segment of the eye. As the first text completely devoted to this topic, Anterior Segment Optical Coherence Tomography comprehensively explains both the scientific principles and the clinical applications of this exciting and advancing technology. Anterior Segment Optical Coherence Tomography enhances surgical planning and postoperative care for a variety of anterior segment applications by expertly explaining how abnormalities in the anterior chamber angle, cornea, iris, and lens can be identified and evaluated using the Visante OCT™ Inside ...
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    19. Intravitreal Colchicine Causes Decreased RNFL Birefringence without Altering RNFL Thickness

      purpose. To test the hypothesis that longitudinal differences between retinal nerve fiber layer (RNFL) birefringence, measured by scanning laser polarimetry (SLP), and RNFL thickness, measured by optical coherence tomography (OCT), are informative about the state of axonal degeneration. methods. Colchicine was injected into the vitreous cavity of one eye in each of six vervet monkeys (Chlorocebus sabaeus; estimated vitreal concentration: 1 mM, n = 3; 2 mM, n = 1; 10 mM, n = 2); an equivalent volume (approximately 0.1 mL) of sterile saline was injected into fellow control eyes. RNFL birefringence was measured by SLP before injection and every 10 minutes ...
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    20. Accuracy of cornea and lens biometry using anterior segment optical coherence tomography.

      Related Articles Accuracy of cornea and lens biometry using anterior segment optical coherence tomography. J Biomed Opt. 2007 Nov-Dec;12(6):064023 Authors: Dunne MC, Davies LN, Wolffsohn JS We assess the accuracy of the Visante anterior segment optical coherence tomographer (AS-OCT) and present improved formulas for measurement of surface curvature and axial separation. Measurements are made in physical model eyes. Accuracy is compared for measurements of corneal thickness (d(1)) and anterior chamber depth (d(2)) using-built-in AS-OCT software versus the improved scheme. The improved scheme enables measurements of lens thickness (d(3)) and surface curvature, in the form ...
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