1. Articles from Louis Hoffart

    1-4 of 4

    1. Dynamic gonioscopy using optical coherence tomography

      Explore Healio.com Ophthalmology
      Dynamic gonioscopy using optical coherence tomography

      BACKGROUND AND OBJECTIVE: To describe the use of anterior segment optical coherence tomography (AS-OCT) in studying the dynamic changes of the anterior chamber angle by corneal indentation. PATIENTS AND METHODS: In a prospective observational study, the anterior segments of 21 eyes were imaged using AS-OCT. After the initial scan, a second scan was executed on the same areas with a central corneal indentation. An evaluation of the reopening of the angle and its measurement were performed. RESULTS: With AS-OCT, the indirect signs were accurate enough to guide the diagnosis in all plateau iris confirmed by ultrabiomicroscopy. The angle widths were ...

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      Mentions: Topcon Medical Systems

    2. Micrometer scale resolution images of human corneal graft using full-field optical coherence tomography (FF-OCT)-link to polarimetric study of scattered field

      Explore SPIE Digital Library Ophthalmology
      Micrometer scale resolution images of human corneal graft using full-field optical coherence tomography (FF-OCT)-link to polarimetric study of scattered field
      The suitability of a corneal graft for transplant surgery is based on different criteria. It may be rejected in particular due to a loss of transparency, directly linked to its scattering properties. Then, these become an important parameter. The aim of this paper is to quantify the influence of the cornea thickness and of the epithelial layer on scattering properties. The origin of scattering is discussed based on polarimetric analysis of scattered field (surface and/or bulk) and on full-field optical coherence tomography imaging (structural information).
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    3. Scattering properties and transparency characterization of human corneal grafts

      Explore SPIE Digital Library Ophthalmology
      Scattering properties and transparency characterization of human corneal grafts
      The cornea is the single human tissue being transparent. This unique property may be explained by the particular structure of the cornea, but the precise role of each of its constituents remains unsolved. On other matter, prior to corneal transplant, graft must be evaluated during a sorting procedure where a technician assesses of its transparency quality. Nevertheless, this criterion remains subjective and qualitative. This study proposes to combine 3D imagery using Full-Field Optical Coherence Tomography jointly with angular resolved scattering measurement to achieve a quantitative transparency characterization of the cornea. The OCT provides micrometric resolution structural information about the cornea ...
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    4. Human graft cornea and laser incisions imaging with micrometer scale resolution full-field optical coherence tomography

      Explore SPIE Digital Library Ophthalmology
      Human graft cornea and laser incisions imaging with micrometer scale resolution full-field optical coherence tomography
      Micrometer scale resolution full-field optical coherence tomography (FF-OCT) is developed for imaging human graft corneas. Three-dimensional (3-D) images with ultrahigh resolution (respectively, 1 and 1.5 µm in the axial and transverse directions), comparable to traditional histological sections, are obtained allowing the visualization of the cells and the precise structure of the different layers that compose the tissue. The sensitivity of our device enables imaging the entire thickness of the cornea, even in edematous corneas more than 800 µm thick. Furthermore, we provide tomographic 3-D images of laser incisions inside the tissue at various depths without slicing the studied corneas ...
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    1-4 of 4
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    1. (1 articles) Topcon Medical Systems
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    Human graft cornea and laser incisions imaging with micrometer scale resolution full-field optical coherence tomography Scattering properties and transparency characterization of human corneal grafts Micrometer scale resolution images of human corneal graft using full-field optical coherence tomography (FF-OCT)-link to polarimetric study of scattered field Dynamic gonioscopy using optical coherence tomography Optical coherence tomography findings in patients with transfusion-dependent β-thalassemia Higher-order regression three-dimensional motion-compensation method for real-time optical coherence tomography volumetric imaging of the cornea Optical coherence tomography image based eye disease detection using deep convolutional neural network Optical Coherence Tomography Biomarkers in Predicting Treatment Outcomes of Diabetic Macular Edema After Dexamethasone Implants Macular and Optic Disc Parameters in Children with Amblyopic and Nonamblyopic Eyes under Optical Coherence Tomography Fundus Images Optical coherence tomography assessment of the enamel surface after debonding the ceramic brackets using three different techniques Optical Engineering Opening at Aeon Imaging PhD Position for Uncertainty-aware AI-based Predictive Model for Treatment Decision Making at University of Amserdam