1. Stephan Michels

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    1. Mentioned In 10 Articles

    2. Optical Coherence Tomography Angiography (OCT-A) in a Patient with Occult Retinal Dysfunction

      Optical Coherence Tomography Angiography (OCT-A) in a Patient with Occult Retinal Dysfunction
      Multimodal imaging techniques were performed in a patient with a newly emerged visual field defect; a missing retinal lesion on fundus examination made the diagnosis challenging but infrared imaging showed a larger area of retinal abnormality temporal to the fovea. Indocyanine green angiography (IA) showed late hypofluorescence and there was mild hyperautofluorescence which is known from acute zonal occult outer retinopathy (AZOOR). Despite normal fluorescein angiography (FA) results, a perfusion ...
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    3. Optical coherence tomography angiography in age-related macular degeneration: persistence of vascular network in quiescent choroidal neovascularization

      Optical coherence tomography angiography in age-related macular degeneration: persistence of vascular network in quiescent choroidal neovascularization
      This study was supported by the Werner H. Spross Foundation (Zurich, Switzerland). The Stiftung wissenschaftliche Forschung, Fonds Ophthalmologie, City Hospital Triemli received research grants from Novartis Schweiz AG and Bayer Schweiz AG and payments for invited talks or advisory board participations for M.B and S.M. from Allergan, Novartis, Alimera, Bayer, Roche and Clanotech. None of the authors above has any conflict of interest related to this research. This ...
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    4. Clinical Experience With the First Commercially Available Intraoperative Optical Coherence Tomography System

      Clinical Experience With the First Commercially Available Intraoperative Optical Coherence Tomography System
      BACKGROUND AND OBJECTIVE: A retrospective, single-center case-series was initiated to evaluate initial clinical experience with the first commercially available intraoperative optical coherence tomography system (iOCT). PATIENTS AND METHODS: The Rescan 700 iOCT (Zeiss, Oberkochen, Germany), a spectral-domain OCT system integrated into a surgical microscope, was used in 40 consecutive cases. A standardized review was used to assess whether iOCT imaging resulted in additional information and/or altered decision-making. RESULTS: The ...
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    5. Optical coherence tomography angiography of the foveal avascular zone in diabetic retinopathy

      Optical coherence tomography angiography of the foveal avascular zone in diabetic retinopathy
      Purpose To analyze foveal avascular zone (FAZ) dimensions and symmetry in patients with diabetic retinopathy (DR) compared to healthy controls using optical coherence tomography angiography (OCT angiography). Methods OCT angiography was performed via an Avanti RTVue 100 XR OCT system (Optovue, Inc., Fremont, CA, USA) in patients with diabetes mellitus (DM) and healthy adults. A frame centered on the fovea was used for FAZ measurements. The borders of the superficial ...
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    6. Effect of intravitreal bevacizumab (Avastin®) in neovascular age-related macular degeneration using a treatment regimen based on optical coherence tomography: 6- and 12-month results

      study the effect of intravitreal bevacizumab therapy on visual and anatomical outcomes in patients with neovascular age-related macular degeneration (AMD) within a follow-up period of 6 and 12 months. Methods: A retrospective analysis of 102 eyes of 102 consecutive patients with neovascular AMD evaluated repeated intravitreal bevacizumab (1 or 2.5 mg) injections. Retreatment was performed following an optical coherence tomography (OCT)-based regimen. Ophthalmic examination included best-corrected visual acuity ...
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    7. A Variable-dosing Regimen with Intravitreal Ranibizumab for Neovascular Age-related Macular Degeneration: Year 2 of the PrONTO Study

      Purpose: To assess the long-term efficacy of a variable-dosing regimen with ranibizumab in the Prospective Optical Coherence Tomography (OCT) Imaging of Patients with Neovascular Age-Related Macular Degeneration (AMD) Treated with intraOcular Ranibizumab (PrONTO) Study, patients were followed for 2 years.Design: A 2-year prospective, uncontrolled, variable-dosing regimen with intravitreal ranibizumab based on OCT.Methods: In this open-label, prospective, single-center, uncontrolled clinical study, AMD patients with neovascularization involving the central fovea ...
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    8. Segmentation of the retinal pigment epithelium by polarization sensitive optical coherence tomography

      Christoph K. Hitzenberger, Erich Gotzinger, Michael Pircher et al. We report on a new method for segmenting the retinal pigment epithelium (RPE) in polarization sensitive optical coherence tomography (PS-OCT) images of the human retina. Contrary to previous segmentation algorithms that were based on variations of backscattered intensity between individual layers, o ... [Proc. SPIE Int. Soc. Opt. Eng. 6847, 684705 (2008)] published Mon Feb 18, 2008.
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    9. Value of polarisation-sensitive optical coherence tomography in diseases affecting the retinal pigment epithelium

      Objectives:To evaluate pathological changes of retinal pigment epithelium (RPE) by polarisation-sensitive optical coherence tomography (PS-OCT).Methods:Forty-four eyes (22 patients) with significant pathologies of the RPE were evaluated using PS-OCT. A transversal scanning time domain OCT system was used for two-dimensional cross-sectional imaging of retinal polarisation properties.Results:The RPE scrambles the polarisation state of backscattered light (ie, acts as a depolarising layer), while the polarisation state of transmitted ...
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    10. Intravitreal avastin for macular edmema secondary to retinal vein occlusion - a prospective study.

      Related Articles Intravitreal avastin for macular edmema secondary to retinal vein occlusion - a prospective study. Br J Ophthalmol. 2008 Jan 22; Authors: Kriechbaum K, Michels S, Prager F, Georgopoulos M, Funk M, Geitzenauer W, Schmidt-Erfurth U Abstract OBJECTIVE: To evaluate efficacy and safety of intravitreal bevacizumab (Avastin) in eyes with macular edema secondary to central (CRVO) or branch retinal vein occlusion (BRVO). METHODS: Twenty-eight consecutive patients (28 patients, 29 eyes ...
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  2. About Stephan Michels

    Stephan Michels is with the Department of Ophthalmology, Medical University of Vienna, Vienna, Austria and the University Eye Hospital Zürich, Switzerland.