1. Articles from Joan L. Jefferys

    1-5 of 5
    1. Detection of Age-Related Macular Degeneration by Portable Optical Coherence Tomography Operated by Nonexpert Personnel: Potential Use for Screenings

      Detection of Age-Related Macular Degeneration by Portable Optical Coherence Tomography Operated by Nonexpert Personnel: Potential Use for Screenings

      Purpose: The purpose of this study is to determine the sensitivity and specificity of detecting age-related macular degeneration (AMD) using portable optical coherence tomography (OCT) operated by nonexpert photographers on undilated patients. Methods: In this case-control study, 92 individuals were recruited from the glaucoma and retina clinics at the Wilmer Eye Institute (Johns Hopkins University, Baltimore, MD). Using the portable iVue (Optovue, Inc, Fremont, CA) spectral-domain OCT (SD-OCT), 2 nonexpert photographers acquired retina map scans on undilated eyes of all participants. In total, 33 AMD eyes and 105 control eyes were evaluated and graded by ophthalmologists masked to the diagnoses ...

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    2. Evaluation of Automated Segmentation Algorithms for Optic Nerve Head Structures in Optical Coherence Tomography Images

      Evaluation of Automated Segmentation Algorithms for Optic Nerve Head Structures in Optical Coherence Tomography Images

      Purpose : To compare the identification of optic nerve head (ONH) structures in optical coherence tomography images by observers and automated algorithms. Methods : ONH images in 24 radial scan sets by optical coherence tomography were obtained in 51 eyes of 29 glaucoma patients and suspects. Masked intraobserver and interobserver comparisons were made of marked endpoints of Bruch's membrane opening (BMO) and the anterior lamina cribrosa (LC). BMO and LC positional markings were compared between observer and automated algorithm. Repeated analysis on 20 eyes by the algorithm was compared. Regional ONH data were derived from the algorithms. Results : Intraobserver difference in ...

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    3. Comparison of Dynamic Changes in Anterior Ocular Structures Examined with Anterior Segment Optical Coherence Tomography in a Cohort of Various Origins

      Comparison of Dynamic Changes in Anterior Ocular Structures Examined with Anterior Segment Optical Coherence Tomography in a Cohort of Various Origins

      Purpose: To identify risk factors for angle closure from iris and angle anterior segment optical coherence tomography (ASOCT) measurements and to determine if these differ by geographic origin. Methods: ASOCT images from 267 clinic-based persons were compared between bright and dark conditions. An automated program quantified angle and iris parameters. Results: Iris area in bright light was larger with increasing age (univariate regression, p=0.0005), and largest in European and African-derived and smallest in Korean and Chinese eyes (multivariable regression, p=0.0001). Iris area was significantly larger in AC groups compared to normal and open angle glaucoma groups ...

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    4. Choroidal Thickness Change after Water Drinking Is Greater in Angle Closure than in Open Angle Eyes [Glaucoma]

      Choroidal Thickness Change after Water Drinking Is Greater in Angle Closure than in Open Angle Eyes [Glaucoma]

      Purpose. To study change in choroidal thickness (CT) after water drinking test (WDT), comparing angle closure (AC) to open angle (OA) eyes.

      Methods. Before and 30 minutes after drinking 1 L of water, 88 glaucoma subjects underwent measurements of CT by spectral domain-optical coherence tomography, IOP, blood pressure (BP), axial length (AL), and anterior chamber depth (ACD).

      Results. Baseline CT was significantly greater in AC than in OA eyes (P = 0.002). After WDT, BP, IOP, and AL increased significantly (all P ≤ 0.0001). Mean CT increased significantly in the AC group (5.6 μm, P = 0.04, n = 40 ...

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    5. Detection of New-Onset Choroidal Neovascularization Using Optical Coherence Tomography: The Amd Doc Study

      Detection of New-Onset Choroidal Neovascularization Using Optical Coherence Tomography: The Amd Doc Study

      Purpose To determine the sensitivity of time domain optical coherence tomography (OCT) in detecting conversion to neovascular age-related macular degeneration (AMD) in eyes at high risk for choroidal neovascularization (CNV), compared with detection using fluorescein angiography (FA) as the gold standard. Design Prospective, multicenter, observational study. Participants Individuals aged ≥50 years with nonneovascular AMD at high risk of progressing to CNV in the study eye and evidence of neovascular AMD in the fellow eye. Methods At study entry and every 3 months through 2 years, participants underwent best-corrected visual acuity, supervised Amsler grid testing, preferential hyperacuity perimetry (PHP) testing, stereoscopic ...

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    1-5 of 5
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  2. Topics in the News

    1. (5 articles) Johns Hopkins University
    2. (1 articles) Lawrence J. Singerman
    3. (1 articles) Jeffrey S. Heier
    4. (1 articles) Optovue
    5. (1 articles) Optovue iVue
    6. (1 articles) National Taiwan University
    7. (1 articles) Singapore Eye Research Institute
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    Detection of New-Onset Choroidal Neovascularization Using Optical Coherence Tomography: The Amd Doc Study Choroidal Thickness Change after Water Drinking Is Greater in Angle Closure than in Open Angle Eyes [Glaucoma] Comparison of Dynamic Changes in Anterior Ocular Structures Examined with Anterior Segment Optical Coherence Tomography in a Cohort of Various Origins Evaluation of Automated Segmentation Algorithms for Optic Nerve Head Structures in Optical Coherence Tomography Images Detection of Age-Related Macular Degeneration by Portable Optical Coherence Tomography Operated by Nonexpert Personnel: Potential Use for Screenings Forward genetic analysis using OCT screening identifies Sfxn3 mutations leading to progressive outer retinal degeneration in mice Optical coherence tomography characteristics of taxane-induced macular edema and other multimodal imaging findings Comparison of different morphologies of choroidal neovascularization evaluated by optical coherence tomography angiography in age‐related macular degeneration The Use of Optical Coherence Tomography Angiography in the Diagnosis of Inflammatory Type 1 Choroidal Neovascularization Secondary to Tuberculosis: A Case Report Improving the Detection of Glaucoma and Its Progression: A Topographical Approach Vulnerability Zone of Glaucoma Progression in Combined Wide-field Optical Coherence Tomography Event-based Progression Analysis The Application of Non-invasive and Cellular Level Resolution Fullfield Optical Coherence Tomography: Establishment and Analysis of Subcutaneous Cellular Level Image Database of Anatomical Locations in Healthy Volunteers and Evaluation of Usability