1. Articles from Jyotsna Maram

    1-6 of 6
    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 performed perpendicularly on the inferior (270°) angle, and the inferior ACA image was acquired 2 times. Inter-instrument and intra-instrument, as well as inter-observer and intra-observer reproducibility of anterior chamber angle ...

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    2. Reproducibility and Agreement Between 2 Spectral Domain Optical Coherence Tomography Devices for Anterior Chamber Angle Measurements

      Reproducibility and Agreement Between 2 Spectral Domain Optical Coherence Tomography Devices for Anterior Chamber Angle Measurements

      Purpose: To compare anterior chamber angle parameters based on the location of Schwalbe line (SL) from 2 spectral domain optical coherence tomography (SD-OCT) instruments and to measure their reproducibility. Methods: Forty-two eyes from 21 normal, healthy participants underwent imaging of the inferior irido-corneal angle with the Spectralis and Cirrus SD-OCT under tightly controlled low-light conditions. SL-angle opening distance (SL-AOD) and SL-trabecular iris space area (SL-TISA) were measured by masked, certified graders at the Doheny Imaging Reading Center using customized grading software. Interinstrument and intrainstrument, as well as interobserver and intraobserver reproducibility of SL-AOD and SL-TISA measurements were evaluated by intraclass ...

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    3. 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 was performed. For Cirrus OCT, a 5-line raster of the inferior angle was performed, centering the third scan line at the 6 o'clock position, with 0.25 mm between ...

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    4. 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 (SL-TISA) measurements were performed by masked certified reading center graders using customized grading software. Intra-acquisition, intergrader, and intragrader reproducibility of SL-AOD and SL-TISA measurements were evaluated by intraclass correlation coefficients ...

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    5. Reproducibility of Angle Metrics Using the Time-Domain Anterior Segment Optical Coherence Tomography: Intra-Observer and Inter-Observer Variability

      Reproducibility of Angle Metrics Using the Time-Domain Anterior Segment Optical Coherence Tomography: Intra-Observer and Inter-Observer Variability

      Purpose : To evaluate the reproducibility of anterior chamber angle measurements obtained by the Zeiss Visante anterior segment optical coherence tomography (AS-OCT). Methods : Twenty eyes from 20 normal subjects with open anterior chamber angles were studied. The anterior chamber angle was imaged using the Visante AS-OCT. The angle-opening distance (AOD 500, AOD 750), trabercular iris space area (TISA 500, TISA 750) and scleral spur angle (SS angle) at the inferior angle location were measured. All the subjects underwent imaging in a darkened room (1 foot candles measured at the eye). Images were graded in a masked fashion by certified Doheny Image ...

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    6. Repeatability and comparative study of corneal thickness using the Visante™ OCT, OCT II and Orbscan II TM

      Repeatability and comparative study of corneal thickness using the Visante™ OCT, OCT II and Orbscan II TM

      he first purpose of this study was to measure the repeatability the Visante TM Optical coherence tomographer (OCT) in a normal sample. The second was to compare corneal thickness measured with the Visante TM OCT to the Zeiss-Humphrey OCT II (model II, Carl Zeiss Meditec) adapted for anterior segment imaging and to the Orbscan II TM (Bausch and Lomb). Fifteen healthy participants were recruited. At the Day 1 visit the epithelial and total corneal thickness, across the central 10 mm of the horizontal meridian was measured using the OCT II and the Visante TM OCT. Only total corneal thickness across ...

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    1-6 of 6
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    Repeatability and comparative study of corneal thickness using the Visante™ OCT, OCT II and Orbscan II TM Reproducibility of Angle Metrics Using the Time-Domain Anterior Segment Optical Coherence Tomography: Intra-Observer and Inter-Observer Variability Reproducibility of Anterior Segment Angle Metrics Measurements Derived From Cirrus Spectral Domain Optical Coherence Tomography Effect of Angle of Incidence on Anterior Chamber Angle Metrics From Optical Coherence Tomography Reproducibility and Agreement Between 2 Spectral Domain 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 Optical Coherence Tomography: Critical Tool to Manage Expectations after Cataract Extraction Improving the characterization of ex vivo human brain optical properties using high numerical aperture optical coherence tomography by spatially constraining the confocal parameters Choroidal, macular and ganglion cell layer thickness assessment in Caucasian children measured with spectral domain optical coherence tomography Examination of retinal vascular density changes via optical coherence tomography angiography in patients with glaucoma 3D reconstruction of coronary artery bifurcations from coronary angiography and optical coherence tomography: feasibility, validation, and reproducibility Age- and refraction-related changes in anterior segment anatomical structures measured by swept-source anterior segment OCT