1. Articles in category: Ophthalmology

    11233-11256 of 11829 « 1 2 ... 466 467 468 469 470 471 472 ... 491 492 493 »
    1. Subretinal fluid from anterior ischemic optic neuropathy demonstrated by optical coherence tomography.

      Related Articles Subretinal fluid from anterior ischemic optic neuropathy demonstrated by optical coherence tomography. Arch Ophthalmol. 2008 Jun;126(6):812-5 Authors: Hedges TR, Vuong LN, Gonzalez-Garcia AO, Mendoza-Santiesteban CE, Amaro-Quierza ML OBJECTIVE: To demonstrate the development of subfoveal fluid associated with optic disc swelling from nonarteritic anterior ischemic optic neuropathy. METHODS: Optical coherence tomographic studies obtained during a 3-year period (October 1, 2003, to December 30, 2006) from 76 patients who developed ischemic optic neuropathy from 2 institutions were evaluated. The presence or absence, and the distribution, of subretinal fluid was determined. RESULTS: Seventy-six patients underwent macular optical coherence ...
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      Mentions: Tufts University
    2. The Role of Abnormal Vitreomacular Adhesion in Age-related Macular Degeneration: Spectral Optical Coherence Tomography and Surgical Results

      Purpose: To assess the incidence of vitreomacular adhesion and traction in age-related macular degeneration (AMD), and to evaluate surgical treatment in a subset of patients with choroidal neovascularization (CNV) nonresponsive to anti-neovascular growth factor (anti-VEGF) treatment.Design: Retrospective observational case-control and interventional case series.Methods: Spectral optical coherence tomography, combined with simultaneous scanning laser ophthalmoscope (Spectral OCT/SLO), was performed in 170 eyes of 94 elderly patients, 61 with exudative AMD, 59 with nonexudative AMD, and 50 control eyes. The presence of hyaloid adhesion to the posterior pole, and vitreomacular traction (VMT) were determined. Five patients with VMT underwent surgical ...
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    3. The optical coherence tomography-ophthalmoscope for examination of central serous chorioretinopathy with precipitates.

      Related Articles The optical coherence tomography-ophthalmoscope for examination of central serous chorioretinopathy with precipitates. Retina. 2008 Jun;28(6):864-9 Authors: Kon Y, Iida T, Maruko I, Saito M PURPOSE:: To report the exact location of multiple yellowish dot-like precipitates in central serous chorioretinopathy (CSC) with the Optical Coherence Tomography (OCT)-Ophthalmoscope (Nidek-OTI, Gamagori, Japan). DESIGN:: Retrospective, observational study. METHODS:: Twenty eyes of 18 patients (average age, 53 years) with CSC were examined by the OCT-Ophthalmoscope. Multiple yellowish dot-like precipitates were seen in all eyes by biomicroscopic examination. RESULTS:: Multiple highly reflective dots (bright dots) were seen by the OCT-Ophthalmoscope ...
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      Mentions: Nidek
    4. A Method Of Reporting Macular Edema After Cataract Surgery Using Optical Coherence Tomography.

      Related Articles A METHOD OF REPORTING MACULAR EDEMA AFTER CATARACT SURGERY USING OPTICAL COHERENCE TOMOGRAPHY. Retina. 2008 Jun;28(6):870-876 Authors: Kim SJ, Belair ML, Bressler NM, Dunn JP, Thorne JE, Kedhar SR, Jabs DA OBJECTIVE:: To validate a method of reporting postcataract macular edema (ME) using optical coherence tomography (OCT). METHODS:: Data were analyzed for 130 eyes followed prospectively for ME after uncomplicated cataract surgery. Each eye underwent OCT within 4 weeks before surgery and at 1 month and 3 months after surgery. ME was defined by observation of cystoid changes by OCT. RESULTS:: Incidence of ME was ...
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    5. Health care kiosk having automated diagnostic eye examination and a fulfillment remedy based thereon

      A stand-alone station such as a kiosk (10) includes automated equipment for performing eye examination procedures on a user positioned in the station (11). Information derived from the examination determines possible existence of a correctable medical condition. The station includes a user interface (22) and a fulfillment remedy section (30) that addresses the medical condition, as by fabrication of eyeglasses (32) for correction of refraction error, or by communicating treatments through the user interface to the user for treating such conditions as age-related macula degeneration, Alzheimer's disease, or visual field impairment. The station also includes a payment device (24 ...
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    6. The effect of solution concentration on diffusion in scleral tissues

      Mohamad G. Ghosn, Esteban F. Carbajal, Natasha A. Befrui et al. The calculation of permeability coefficient of analytes could potentially be used in a variety of basic science and clinical fields, as well as advanced diagnostic imaging. Before this can occur, a more thorough understanding of the diffusion rate of analytes in biological tissues is needed. For thi ... [Proc. SPIE 6791, 679107 (2008)] published Mon Jun 9, 2008.
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    7. OCT scans show paravascular abnormalities may cause a macular retinoschisis in highly myopic eyes

      Serial optical coherence tomography scans demonstrate that paravascular lamellar holes appear to form when the inner wall of paravascular retinal cysts is avulsed by vitreous traction. These paravascular abnormalities are relatively common in eyes with high degrees of myopia, a study by researchers in Japan suggests.
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    8. Detailed Visualization of the Anterior Segment Using Fourier-Domain Optical Coherence Tomography

      Objective  To study details of the anterior chamber drainage angle using Fourier-domain optical coherence tomography in healthy subjects and patients with angle abnormalities. Methods  A high-speed anterior segment optical coherence tomography prototype was developed using a 1310-nm-wavelength swept light source. Six healthy subjects and 6 patients with glaucoma were imaged in an observational cross-sectional study. Results  Schlemm’s canal and the trabecular meshwork were visualized in all of the patients. Fifteen-millimeter scans enabled entire anterior segment visualization providing configuration details of the iris with respect to the angle. Four-millimeter scans permitted detailed views of the angle configuration and its structures ...
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    9. Retinal Morphological Changes of Patients With X-linked Retinoschisis Evaluated by Fourier-Domain Optical Coherence Tomography

      Retinal Morphological Changes of Patients With X-linked Retinoschisis Evaluated by Fourier-Domain Optical Coherence Tomography
      Objective  To investigate the retinal microstructure and lamination of patients affected with X-linked retinoschisis (XLRS) using high-resolution imaging modalities. Methods  Patients diagnosed as having XLRS underwent assessment. Visual function testing included visual acuity, color vision, and full-field electroretinography. We used a high-resolution Fourier-domain optical coherence tomography (FD-OCT) system (4.5-µm axial resolution; 9 frames/s; 1000 A-scans per frame) combined with a handheld scanner. Macular image evaluation included schisis localization and retinal layer integrity. Results  Six patients with XLRS and identified mutations in the XLRS1 gene underwent testing. Visual acuity ranged from 0.2 to 1.6 logMAR (logarithm of ...
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    10. Subretinal Fluid From Anterior Ischemic Optic Neuropathy Demonstrated by Optical Coherence Tomography

      Objective  To demonstrate the development of subfoveal fluid associated with optic disc swelling from nonarteritic anterior ischemic optic neuropathy. Methods  Optical coherence tomographic studies obtained during a 3-year period (October 1, 2003, to December 30, 2006) from 76 patients who developed ischemic optic neuropathy from 2 institutions were evaluated. The presence or absence, and the distribution, of subretinal fluid was determined. Results  Seventy-six patients underwent macular optical coherence tomography within 4 weeks of developing sudden loss of vision in one eye, decreased visual acuity, a visual field defect, a relative afferent pupillary defect, and optic disc swelling with peripapillary hemorrhages ...
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    11. To see the invisible: the quest of imaging vitreous.

      To see the invisible: the quest of imaging vitreous. Dev Ophthalmol. 2008;42:5-28 Authors: Sebag J Purpose: Imaging vitreous has long been a quest to view what is, by design, invisible. This chapter will review important historical aspects, past and present imaging methodologies, and new technologies that are currently in development for future research and clinical applications. Methods: Classic and modern histologic techniques, dark-field slit microscopy, clinical slit lamp biomicroscopy, standard and scanning laser ophthalmoscopy (SLO), ultrasonography, optical coherence tomography (OCT), combined OCT-SLO, magnetic resonance and Raman spectroscopies, and dynamic light scattering methodologies are presented. Results: The best available ...
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    12. Can the risk of retinal pigment epithelium tears after bevacizumab treatment be predicted? An optical coherence tomography study.

      Can the risk of retinal pigment epithelium tears after bevacizumab treatment be predicted? An optical coherence tomography study. Eye. 2008 Jun 6; Authors: Leitritz M, Gelisken F, Inhoffen W, Voelker M, Ziemssen F Background Retinal pigment epithelium (RPE) tears after bevacizumab treatment for neovascular age-related macular degeneration accompanied by a pigment epithelial detachment (PED) might be caused by stretching forces on the already weakened RPE. The purpose of this study was to evaluate whether simple measurements of optical coherence tomography (OCT) can predict the individual risk of an RPE tear in preoperative candidates.Methods A retrospective chart review study of ...
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    13. A Method Of Reporting Macular Edema After Cataract Surgery Using Optical Coherence Tomography.

      A ≥40% increase in baseline center point thickness, determined by optical coherence tomography, may offer a valid and objective method of reporting postcataract macular edema. Standardized reporting of postcataract macular edema would allow objective assessment and comparison of treatment outcomes among clinical studies.Page: 870DOI: 10.1097/IAE.0b013e318169d04eAuthors: KIM, STEPHEN J. MD *; BELAIR, MARIE-LYNE MD +; BRESSLER, NEIL M. MD ++; DUNN, JAMES P. MD ++; THORNE, JENNIFER E. MD, PhD ++[S]; KEDHAR, SANJAY R. MD ++; JABS, DOUGLAS A. MD, MBA ++[S][P]
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    14. The Optical Coherence Tomography-Ophthalmoscope For Examination Of Central Serous Chorioretinopathy With Precipitates.

      Cross-sectional (B-scan) and transverse (C-scan) images obtained by the Optical Coherence Tomography-Ophthalmoscope (Nidek-OTI, Gamagori, Japan) showed subretinal and intraretinal bright dots in eyes with central serous chorioretinopathy, which may indicate that the yellowish dot-like precipitates are not only on the posterior surface of the detached retina but also in the detached neurosensory retina.Page: 864DOI: 10.1097/IAE.0b013e3181669795Authors: KON, YOKO MD; IIDA, TOMOHIRO MD; MARUKO, ICHIRO MD; SAITO, MASAAKI MD
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      Mentions: Nidek
    15. Can the risk of retinal pigment epithelium tears after bevacizumab treatment be predicted? An optical coherence tomography study

      Retinal pigment epithelium (RPE) tears after bevacizumab treatment for neovascular age-related macular degeneration accompanied by a pigment epithelial detachment (PED) might be caused by stretching forces on the already weakened RPE. The purpose of this study was to evaluate whether simple measurements of optical coherence tomography (OCT) can predict the individual risk of an RPE tear in preoperative candidates. Methods A retrospective chart review study of 393 consecutive patients with neovascular age-related macular degeneration evaluated OCT images (Stratus-OCT Zeiss, Jena, Germany). The height of the PED, the central retinal thickness, and the maximum retinal thickness were determined by two independent ...
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    16. Anterior segment optical coherence tomography imaging and histopathologic findings of an overhanging filtering bleb

      The authors have no proprietary interests in any of the products mentioned in the manuscript. W K Kim^1, G J Seong^1, C S Lee^1, Y G Kim^1 and C Y Kim^1 ^1Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
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    17. An unexpectedly low Stratus optical coherence tomography false-positive rate in the non-nasal quadrants of Asian eyes: indirect evidence of differing retinal nerve fibre layer thickness profiles according to ethnicity.

      AIMS: To determine the frequency distribution of false-positive Stratus optical coherence tomography (OCT) results of healthy eyes in terms of peripapillary location. METHODS: One eye of each of 137 healthy Korean subjects was included. The false-positive rates (FPRs) relating to retinal nerve fibre layer (RNFL) thickness parameters were determined. RESULTS: Of the 12 clock-hour positions, the 2 and 4 o'clock positions showed the highest FPRs of 5.1% and 4.4%, respectively, and 7, 8 and 11 o'clock had the lowest FPRs of 0% at PMID: 18523076 [PubMed - in process]
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    18. Normative data of outer photoreceptor layer thickness obtained by software image enhancing based on Stratus optical coherence tomography images.

      Normative data of outer photoreceptor layer thickness obtained by software image enhancing based on Stratus optical coherence tomography images. Br J Ophthalmol. 2008 Jun;92(6):800-5 Authors: Christensen UC, Kroyer K, Thomadsen J, Jorgensen TM, la Cour M, Sander B AIM: To present normative data of outer photoreceptor layer thickness obtained by a new semiautomatic image analysis algorithm operating on contrast-enhanced optical coherence tomography (OCT) images. METHODS: Eight Stratus OCT3 scans from identical retinal locations from 25 normal eyes were registered and combined to form a contrast-enhanced average image. Utilising the vertical intensity gradients of the enhanced OCT images ...
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    19. Combining Nerve Fiber Layer Parameters to Optimize Glaucoma Diagnosis with Optical Coherence Tomography

      Purpose To identify the best combination of Stratus optical coherence tomography (OCT) retinal nerve fiber layer (RNFL) thickness parameters for the detection of glaucoma. Design Observational cross-sectional study. Participants Eighty-nine age-matched normal and perimetric glaucoma participants enrolled in the Advanced Imaging for Glaucoma Study. Methods The Zeiss Stratus OCT system was used to obtain the circumpapillary RNFL thickness in both eyes of each participant. Right and left eye clock-hour data are analyzed together, assuming mirror-image symmetry. The RNFL diagnostic parameters were combined using either or-logic or and-logic approaches. Main Outcome Measures Area under the receiver operating characteristic curve (AROC), sensitivity ...
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    20. Visualization of the posterior vitreous membrane in diabetic macular edema patients using three-dimensional optical coherence tomography

      [Visualization of the posterior vitreous membrane in diabetic macular edema patients using three-dimensional optical coherence tomography] Nippon Ganka Gakkai Zasshi. 2008 May;112(5):459-64 Authors: Ogino T, Takeda M, Imaizumi H, Okushiba U PURPOSE: To study the visualization of the vitreoretinal interface in diabetic macular edema patients using three-dimensional optical coherence tomography (3 D-OCT) and to compare it to surgical findings. METHODS: We prospectively examined the medical records of 25 patients (30 eyes) with diabetic macular edema measured by 3 D-OCT (optic disc and macular lesions) who received vitrectomy between August 2006 and February 2007. We compared the findings ...
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    21. Macular Thickness Assessment in Healthy Eyes Based on Ethnicity Using Stratus OCT Optical Coherence Tomography.

      Related Articles Macular Thickness Assessment in Healthy Eyes Based on Ethnicity Using Stratus OCT Optical Coherence Tomography. Invest Ophthalmol Vis Sci. 2008 Jun;49(6):2668-72 Authors: Kelty PJ, Payne JF, Trivedi RH, Kelty J, Bowie EM, Burger BM PURPOSE: To assess the variation in macular thickness measurements in healthy Caucasian and African American men and women through Stratus OCT optical coherence tomography (OCT-3). METHODS: One hundred sixty-six eyes of 83 healthy patients underwent complete ophthalmologic examination in this prospective study. Exclusion criteria included a diagnosis of diabetes mellitus, hypertension, intraocular pressure (IOP) greater than 21 mm Hg, history of ...
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