1. Articles from c. k. s. leung

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    1. Anterior chamber angle imaging with optical coherence tomography

      Explore Nature Publishing Group Ophthalmology
      Anterior chamber angle imaging with optical coherence tomography
      The technology of optical coherence tomography (OCT) has evolved rapidly from time-domain to spectral-domain and swept-source OCT over the recent years. OCT has become an important tool for assessment of the anterior chamber angle and detection of angle closure. Improvement in image resolution and scan speed of OCT has facilitated a more detailed and comprehensive analysis of the anterior chamber angle. It is now possible to examine Schwalbe's line and Schlemm's canal along with the scleral spur. High-speed imaging allows evaluation of the angle in 360°. With three-dimensional reconstruction, visualization of the iris profiles and the angle configurations ...
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      Mentions: UCSD The Chinese University of Hong Kong University of Hong Kong

    2. Effects of scan circle displacement in optical coherence tomography retinal nerve fibre layer thickness measurement: a RNFL modelling study

      Explore Nature Publishing Group Ophthalmology
      Objective To study the effect of optical coherence tomography (OCT) scan circle displacement on retinal nerve fibre layer (RNFL) measurement errors using cubic spline models. Methods Forty-nine normal subjects were included in the analysis. In one randomly selected eye in each subject, RNFL thickness around the optic disc was measured by taking 16 circular scans of different sizes (scan radius ranged from 1 to 2.5 mm). The RNFL profile in each eye was constructed with a mathematical model using a smoothing spline approximation. Scan circle (diameter 3.4 mm) RNFL measurements (total average, superior, nasal, inferior, and temporal RNFL ...
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      Mentions: UCSD The Chinese University of Hong Kong Hong Kong Polytechnic University

    3. In vivo measurements of macular and nerve fibre layer thickness in retinal arterial occlusion

      Explore Nature Publishing Group Ophthalmology
      Aim To investigate the structure–function relationship in patients with retinal arterial occlusion by measuring the macular and the peripapillary retinal nerve fibre layer (RNFL) thickness and the visual sensitivity. Methods This is an observational case series with three patients with central retinal arterial occlusion (CRAO) and two patients with branch retinal arterial occlusion (BRAO). The macular/peripapillary RNFL thickness and the visual field were measured with Stratus optical coherence tomography (OCT) and Humphrey visual field analyzer, respectively, at least 1 year after the diagnosis of CRAO or BRAO. Results The macular thickness, in particular the inner retinal layer, and ...
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      Mentions: The Chinese University of Hong Kong
    1-3 of 3
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