1. Articles mentioning both UCLA and Vikas Chopra

    1-15 of 15
    1. Reproducibility and agreement of four anterior segment-optical coherence tomography devices for anterior chamber angle measurements

      Reproducibility and agreement of four anterior segment-optical coherence tomography devices for anterior chamber angle measurements
      Purpose To compare the reproducibility and agreement of anterior chamber angle (ACA) parameters and metrics obtained by four different anterior segment-optical coherence tomography (AS-OCT) devices. Methods In this prospective study, 30 eyes from 15 normal subjects underwent anterior segment angle scanning using the Spectralis, Cirrus, and Optovue spectral domain optical coherence tomography (SD-OCT), as well as the Visante time-domain optical coherence tomography (TD-OCT). For each eye, the scan line was ...
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    2. Identification and Characterization of Imaging Technique Errors and Artifacts using Anterior Segment Optical Coherence Tomography for Irido-Corneal Angle Evaluations in Glaucom

      Identification and Characterization of Imaging Technique Errors and Artifacts using Anterior Segment Optical Coherence Tomography for Irido-Corneal Angle Evaluations in Glaucom
      Purpose Anterior segment optical coherence tomography (ASOCT) platforms provide non-invasive and quantifiable evaluations of anterior chamber angle (ACA) anatomy. Even though these ACA measurements have been validated with high repeatability and reproducibility, we are the first study to describe in detail the technique errors and artifacts that may occur during imaging of the ACA. The purpose of this study was to define the different types and quantify the frequency of ...
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    3. Potential applications of optical coherence tomography angiography in glaucoma

      Potential applications of optical coherence tomography angiography in glaucoma
      Purpose of review Optical coherence tomography angiography (OCTA) is a novel, noninvasive imaging modality that allows assessment of the retinal and choroidal vasculature. The scope of this review is to summarize recent studies using OCTA in glaucoma and highlight potential applications of this new technology in the field of glaucoma . Recent findings OCTA studies have shown that retinal vascular changes may not develop solely as a result of advanced glaucoma ...
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      Mentions: UCLA Vikas Chopra
    4. Automated circumferential construction of first-order aqueous humor outflow pathways using spectral-domain optical coherence tomography

      Automated circumferential construction of first-order aqueous humor outflow pathways using spectral-domain optical coherence tomography
      The purpose was to create a three-dimensional (3-D) model of circumferential aqueous humor outflow (AHO) in a living human eye with an automated detection algorithm for Schlemms canal (SC) and first-order collector channels (CC) applied to spectral-domain optical coherence tomography (SD-OCT). Anterior segment SD-OCT scans from a subject were acquired circumferentially around the limbus. A Bayesian Ridge method was used to approximate the location of the SC on infrared confocal ...
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    5. Retinal vessel density from optical coherence tomography angiography to differentiate early glaucoma, pre-perimetric glaucoma and normal eyes

      Retinal vessel density from optical coherence tomography angiography to differentiate early glaucoma, pre-perimetric glaucoma and normal eyes
      ... Doheny Eye Center glaucoma clinic. The research protocols were approved by the Institutional Review Board of UCLA, performed in accord with the tenets of the Declaration of Helsinki. Written informed consent was obtaine...
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    6. Pilot Study of Lamina Cribrosa Intensity Measurements in Glaucoma Using Swept-Source Optical Coherence Tomography

      Pilot Study of Lamina Cribrosa Intensity Measurements in Glaucoma Using Swept-Source Optical Coherence Tomography
      Purpose: To compare the lamina cribrosa (LC) intensity in glaucoma-suspect eyes and eyes with mild to moderate glaucoma using swept-source optical coherence tomography. Methods: Optic disc volume scans were collected using swept-source optical coherence tomography in 19 clinically defined glaucoma-suspect eyes and 29 eyes with mild to moderate glaucoma. LC intensity was measured using Image J software, and the resultant values were normalized using the retinal pigment epithelium and vitreous ...
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    7. Anterior Chamber Angle Morphometry Measurement Changes to Ambient Illumination Scaling in Visante Time Domain Optical Coherence Tomography

      Anterior Chamber Angle Morphometry Measurement Changes to Ambient Illumination Scaling in Visante Time Domain Optical Coherence Tomography
      Purpose : To test the effect of ambient illumination scaling on the reproducibility and reliability anterior chamber metrics using the Visante time domain optical coherence tomography (TD-OCT) instrument. Materials and methods : The inferior irido-corneal angles of 25 normal, healthy eyes were imaged twice with the Zeiss Visante TD-OCT under five strictly controlled ambient light conditions (foot candles (fc) measured with a light meter at camera/eye interface). Each eye was imaged ...
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    8. Utility of anterior segment swept-source optical coherence tomography for imaging eyes with antecedent ocular trauma

      Utility of anterior segment swept-source optical coherence tomography for imaging eyes with antecedent ocular trauma
      Purpose To evaluate the utility of swept source optical coherence tomography (SS-OCT) for the analysis of anterior segment structures in cases with previous traumatic eye injuries. Observations We report three eyes of three patients with anterior segment traumatic eye injury and highlight the role of SS-OCT in their evaluation and management. This technology enabled us to visualize the structural details of anterior segment of the eye and augment the clinical ...
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      Mentions: UCLA Vikas Chopra
    9. Effects of Light Variation on Schwalbe's Line-based Anterior Chamber Angle Metrics Measured with Cirrus Spectral Domain Optical Coherence Tomography

      Effects of Light Variation on Schwalbe's Line-based Anterior Chamber Angle Metrics Measured with Cirrus Spectral Domain Optical Coherence Tomography
      ...s using spectral domain optical coherence tomography (SD-OCT). Design Images were taken at Doheny Eye Centers-UCLA clinic, which were randomized, masked, and graded twice by dual reading center graders. Participants 25 n...
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    10. Predicting Development of Glaucomatous Visual Field Conversion Using Baseline Fourier-Domain Optical Coherence Tomography

      Predicting Development of Glaucomatous Visual Field Conversion Using Baseline Fourier-Domain Optical Coherence Tomography
      Purpose To predict the development of glaucomatous visual field (VF) defects using Fourier-domain optical coherence tomography (FD-OCT) measurements at baseline visit. Design Multi-center longitudinal observational study. Glaucoma suspects and pre-perimetric glaucoma participants in the Advanced Imaging for Glaucoma Study. Methods The optic disc, the peripapillary retinal nerve fiber layer (NFL), and macular ganglion cell complex (GCC) were imaged with FD-OCT VF was assessed every 6 months. Conversion to perimetric glaucoma ...
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    11. Agreement in Quantitative Anterior Chamber Angle Metrics between RTVue and Cirrus Spectral Domain Optical Coherence Tomography

      Agreement in Quantitative Anterior Chamber Angle Metrics between RTVue and Cirrus Spectral Domain Optical Coherence Tomography
      Purpose: To investigate the agreement between two spectral domain optical coherence tomography (SD-OCT) instruments in Schwalbes line (SL) based anterior chamber angle parameters and to evaluate their repeatability and reproducibility. Methods: The inferior irido-corneal angle of 114 eyes from 59 participants (29 glaucoma and 30 normal) were scanned twice with the Optovue SD-OCT and Cirrus SD-OCT under controlled low luminance conditions. SL angle opening distance (SL-AOD) and SL trabecular-iris-space area ...
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    12. Comparison of Physiologic versus Pharmacologic Mydriasis on Anterior Chamber Angle Measurements Using Spectral Domain Optical Coherence Tomography

      Comparison of Physiologic versus Pharmacologic Mydriasis on Anterior Chamber Angle Measurements Using Spectral Domain Optical Coherence Tomography
      Purpose. To compare the effects of physiologic versus pharmacologic pupil dilation on anterior chamber angle (ACA) measurements obtained with spectral domain optical coherence tomography (SD-OCT). Methods. Forty eyes from 20 healthy, phakic individuals with open angles underwent anterior segment OCT imaging under 3 pupillary states: (1) pupil constricted under standard room lighting, (2) physiologic mydriasis in a darkened room, and (3) postpharmacologic mydriasis. Inferior angle Schwalbes line-angle opening distance (SL-AOD ...
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    13. Effect of Angle of Incidence on Anterior Chamber Angle Metrics From Optical Coherence Tomography

      Effect of Angle of Incidence on Anterior Chamber Angle Metrics From Optical Coherence Tomography
      Purpose: To evaluate the local variability of anterior chamber angle (ACA) metrics obtained by time domain (TD) and spectral domain (SD) optical coherence tomography (OCT). Materials and Methods: Anterior-segment OCT imaging was performed on 30 normal eyes using Visante TD-OCT and 40 normal eyes using Cirrus SD-OCT. For Visante OCT, a single 16-mm line scan of the inferior angle with 3 slightly different rotations of 265, 270, and 275 degrees ...
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    14. Reproducibility of Anterior Segment Angle Metrics Measurements Derived From Cirrus Spectral Domain Optical Coherence Tomography

      Reproducibility of Anterior Segment Angle Metrics Measurements Derived From Cirrus Spectral Domain Optical Coherence Tomography
      Purpose: To investigate the reproducibility of anterior segment angle (ACA) metrics measurements in normal subjects on Cirrus spectral domain optical coherence tomography (SD-OCT). Methods: 40 eyes from 20 healthy, normal subjects underwent anterior segment imaging using a Cirrus SD-OCT. For each eye, 2 acquisitions of 5-line raster scans were performed perpendicularly on the inferior (270 degrees) angle. The Schwalbe's line-angle opening distance (SL-AOD) and Schwalbe's line-trabecular-iris space area ...
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  2. Organizations in the News

    1. (1 articles) Center for Ophthalmic Optics and Lasers
    2. (1 articles) David Geffen School of Medicine
    3. (1 articles) Oregon Health & Science University
    4. (1 articles) UCSD
    5. (1 articles) University of Pittsburgh
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    1. (11 articles) Srinivas R. Sadda
    2. (1 articles) Joel S. Schuman
    3. (1 articles) Mary K. Durbin
    4. (1 articles) Yimin Wang
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  4. OCT Companies in the News

    1. (6 articles) Carl Zeiss Meditec
    2. (3 articles) Optovue
    3. (2 articles) Topcon Medical Systems