All Articles from Ian Y. H. Wong -Optical Coherence Tomography News

Articles from Ian Y. H. Wong

1-4 of 4
1. Macular Vessel Density Measured With Optical Coherence Tomography Angiography and Its Associations in a Large Population-Based Study
  
  Explore IOVS Journal Nov 26 2019 Ophthalmology
  
  Purpose : We investigate macular perfusion and the systemic and ocular associations in a population-based setting. Methods : In this cross-sectional study, 2018 adults residing in Hong Kong underwent detailed ophthalmic examinations after consenting to participate. Macular perfusion was measured with optical coherence tomography angiography (OCTA) using the split-spectrum amplitude decorrelation angiography algorithm. The parafoveal flow index and vessel area density were quantified using automated custom-built software. Results : Of the 2018 participants, the OCTA measurements were available for 1940, and 1631 (84.1%) had good quality scans. The right eyes of these 1631 participants (43.1% men) were included for final analysis ...
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  Mentions: Oregon Health & Science University University of Hong Kong
2. Serial Spectral-Domain Optical Coherence Tomography Findings in Acute Retinal Pigment Epitheliitis and the Correlation to Visual Acuity
  
  Explore Ophthalmology Mar 9 2017 Ophthalmology
  
  Purpose To evaluate the features of acute retinal pigment epitheliitis (ARPE) at onset and in the course of recovery by serial spectral-domain optical coherence tomography (SD OCT) and the correlation to visual acuity (VA). Design Retrospective cohort study. Participants Consecutive patients with ARPE. Methods A review of medical records was performed. Main Outcome Measures Integrity of SD OCT retinal bands at onset and in the course of disease, time required to achieve each retinal band restoration, corresponding VA change, and final VA. Results Four patients were included. Initial SD OCT showed a dome-shaped hyper-reflective lesion at the photoreceptor outer segment ...
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3. Central Macular Thickness in Children with Myopia, Emmetropia, and Hyperopia: An Optical Coherence Tomography Study
  
  Explore Hindawi Publishing Corporation Jul 16 2015 Ophthalmology
  
  Purpose. To investigate the central macular thickness (CMT) in myopic, emmetropic, and hyperopic Chinese children using Optical Coherence Tomography. Methods. 168 right eyes of Chinese subjects aged 4–18 were divided into 3 groups based on their postcycloplegic spherical equivalent: myopes (<−1.0 D); emmetropes (≥−1.0 to ≤+1.0 D); and hyperopes (>+1.0 D) and the CMT was compared before/after age adjustment. The CMT was correlated with age, axial length, and peripapillary retinal nerve fibre layer (RNFL). Results. The mean CMT was μ m and the mean population age was years. The CMT was thickest in the myopes ...
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  Mentions: University of Hong Kong
4. Retinal Nerve Fiber Layer Thickness After a Single Attack of Primary Acute Angle-Closure Glaucoma Measured With Optical Coherence Tomography
  
  Explore Ophthalmic Surgery, Lasers and Imaging Feb 5 2010 Ophthalmology
  
  BACKGROUND AND OBJECTIVE After a single unilateral acute primary angle-closure glaucoma attack, retinal nerve fiber layer (RNFL) may be thinned. The current study measured the RNFL thickness using optical coherence tomography in eyes with normal visual fields after recovery from a single attack of acute primary angle-closure glaucoma. PATIENTS AND METHODS Twenty-one patients and age-matched control subjects underwent optical coherence tomography scanning after recovery from a single unilateral acute primary angle-closure glaucoma attack. Data from the affected eyes, normal fellow eyes, and control subjects were compared. RESULTS Average RNFL thickness was 91.3 ± 16.4 µm in the affected eyes ...
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