1. Arun K. Narayanaswamy

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    1. Mentioned In 9 Articles

    2. Analysis of Anterior Segment Dynamics Using Anterior Segment Optical Coherence Tomography Before and After Laser Peripheral Iridotomy

      Analysis of Anterior Segment Dynamics Using Anterior Segment Optical Coherence Tomography Before and After Laser Peripheral Iridotomy
      Objective To evaluate changes in the speed of pupil constriction and in anterior segment parameters after laser peripheral iridotomy (LPI) in patients with angle closure using anterior segment optical coherence tomography. Methods In this prospective observational study, videos of pupil and anterior segment changes in response to illumination were captured with real-time video recording using anterior segment optical coherence tomography and were analyzed frame by frame before and after LPI ...
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    3. Relationship Between Intraocular Pressure and Angle Configuration: An Anterior Segment OCT Study

      Relationship Between Intraocular Pressure and Angle Configuration: An Anterior Segment OCT Study
      Purpose: To assess the relationship between intra-ocular pressure (IOP) and anterior chamber angle (ACA) configuration as assessed by gonioscopy and anterior segment optical coherence tomography (AS-OCT). Methods: 2045 subjects aged 50 years and over, recruited from a community clinic, underwent AS-OCT, Goldmann applanation tonometry, and gonioscopy. A quadrant was classified as closed on gonioscopy if the posterior trabecular meshwork could not be seen. A closed quadrant on AS-OCT was defined ...
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    4. Swept source optical coherence tomography measurement of the iris–trabecular contact (ITC) index: a new parameter for angle closure

      Swept source optical coherence tomography measurement of the iris–trabecular contact (ITC) index: a new parameter for angle closure
      ... index: a new parameter for angle closure Sue-Wei Ho, Mani Baskaran, Ce Zheng, Tin A. Tun, Shamira A. Perera, Arun K. Narayanaswamy, David S. Friedman and Tin Aung * Download PDF (422.4 KB) * View HTML * Permissions & Re...
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    5. Comparison of two spectral domain optical coherence tomography devices for angle closure assessment

      Comparison of two spectral domain optical coherence tomography devices for angle closure assessment
      Purpose. To compare two spectral domain optical coherence tomography (SD-OCT) devices for the identification of angle structures and the presence of angle closure Methods. This was a prospective comparative study. Consecutive patients underwent gonioscopy and anterior segment imaging using 2 SD-OCT devices (iVue [Optovue Corporation, Fremont, Ca] and Cirrus [Carl Zeiss Meditec, Dublin, Ca]). Images were evaluated for the ability to detect angle structures such as Schwalbe's line (SL ...
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    6. Diagnostic Performance of Anterior Chamber Angle Measurements for Detecting Eyes With Narrow Angles: An Anterior Segment OCT Study: An Anterior Segment OCT Study

      Diagnostic Performance of Anterior Chamber Angle Measurements for Detecting Eyes With Narrow Angles: An Anterior Segment OCT Study: An Anterior Segment OCT Study
      ...ral spur precludes quantitative analysis in approximately 25% of AS-OCT images. An Anterior Segment OCT Study Arun Narayanaswamy, DNB; Lisandro M. Sakata, MD, PhD; Ming-Guang He, MD, PhD; David S. Friedman, MD, PhD; Yion...
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    7. Imaging of blebs after phacotrabeculectomy with Ologen collagen matrix implants

      Imaging of blebs after phacotrabeculectomy with Ologen collagen matrix implants
      Objective To analyse blebs of phacotrabeculectomies performed with Ologen collagen implants (ProTop & MediKing, Taipei, Taiwan) and to compare these with blebs of mitomycin C (MMC)–augmented phacotrabeculectomies. Methods 33 participants underwent phacotrabeculectomy with Ologen implants, and 33 controls underwent phacotrabeculectomy with MMC. Blebs were analysed for height and area using anterior segment optical coherence tomography (ASOCT) at 30, 60 and 90 days after surgery and were also graded clinically with ...
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    8. Evaluation of Scanning Protocols for Imaging the Anterior Chamber Angle With Anterior Segment-Optical Coherence Tomography

      Purpose: To evaluate different anterior segment-optical coherence tomography (AS-OCT) scanning protocols for detecting eyes with angle closure. Methods: This cross-sectional study enrolled 2104 subjects from a community clinic in Singapore. All participants underwent AS-OCT imaging in the dark (Visante, Carl-Zeiss, Meditec, Dublin, CA), and gonioscopy with a Goldmann 2-mirror and a Sussman lens by an experienced examiner. The anterior chamber angle in a particular quadrant was considered closed on gonioscopy ...
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  2. About Arun K. Narayanaswamy

    Arun Narayanaswamy, M.D., is a clinical research fellow at the Singapore Eye Research Institute.

  3. Quotes

    1. We excluded 522 subjects due to poor localization of the scleral spur in the AS-OCT images and 60 subjects due to image artifacts.
      In Evaluating the anterior chamber angle with OCT
    2. This is the first community-based study to evaluate quantitative AS-OCT parameters for the detection of angle closure....Quantitative analysis of AS-OCT images is a promising approach for detecting angle closure.
      In Evaluating the anterior chamber angle with OCT