All Articles from Tien-Yin Wong -Optical Coherence Tomography News

Articles from Tien-Yin Wong

1-5 of 5
1. Detailed Phenotyping and Characterization of Choroidal Morphological and Vascular Features in Young Men with High Myopia Using Spectral-Domain Optical Coherence Tomography
  
  Explore Elsevier Health Feb 13 2017 Ophthalmology
  
  Purpose To describe detailed morphological and vascular features of the choroid in eyes with high myopia. Design Cross-sectional study. Methods 515 eyes of young men (mean age 21.59±1.15) years) with high myopia (defined as -6.0 D or worse, mean spherical equivalent -8.66±2.00 D) and 88 controls with emmetropia in both eyes underwent choroidal imaging using spectral domain optical coherence tomography with enhanced depth imaging (EDI-OCT). Raw OCT images were loaded on a custom-written application on MATLAB that enabled delineation for detailed morphological and vascular analyses, including the distance of thickest point from the ...
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  Mentions: Singapore Eye Research Institute
2. Relationship of ocular and systemic factors to the visibility of choroidal–scleral interface using spectral domain optical coherence tomography
  
  Explore Wiley Online Library Jun 28 2015 Ophthalmology
  
  Purpose To assess the visibility of the choroidal–scleral interface (CSI) from spectral domain optical coherence tomography (SD-OCT) and evaluate the ocular and systemic factors influencing the visibility of CSI in healthy eyes from population-based Malay sample. Methods Participants were consecutively recruited from the population-based Singapore Malay Eye Study-2 (SiMES-2). SD-OCT images were obtained by Spectralis OCT with enhanced depth imaging (EDI) mode. Visibility of CSI was assessed by a grading system ranging from 0 to 2 scores. The reliability of choroidal thickness measurement in different grades of CSI visibility was assessed using intraclass correlation coefficient. Ordinal regression analyses were ...
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  Mentions: Singapore Eye Research Institute National University of Singapore
3. A Simplified Method to Measure Choroidal Thickness Using Adaptive Compensation in Enhanced Depth Imaging Optical Coherence Tomography
  
  Explore PLoS ONE May 5 2014 Ophthalmology
  
  Purpose To evaluate a simplified method to measure choroidal thickness (CT) using commercially available enhanced depth imaging (EDI) spectral domain optical coherence tomography (SD-OCT). Methods We measured CT in 31 subjects without ocular diseases using Spectralis EDI SD-OCT. The choroid-scleral interface of the acquired images was first enhanced using a post-processing compensation algorithm. The enhanced images were then analysed using Photoshop. Two graders independently graded the images to assess inter-grader reliability. One grader re-graded the images after 2 weeks to determine intra-grader reliability. Statistical analysis was performed using intra-class correlation coefficient (ICC) and Bland-Altman plot analyses. Results Using adaptive compensation ...
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  Mentions: Singapore Eye Research Institute National University of Singapore
4. Association of Narrow Angles With Anterior Chamber Area and Volume Measured With Anterior-Segment Optical Coherence Tomography]
  
  Explore Archives of Ophthalmology May 9 2011 Ophthalmology
  
  Objectives To describe the measurement of anterior chamber area and anterior chamber volume by anterior-segment optical coherence tomography and to investigate the association of these parameters with the presence of narrow angles. Methods This was a cross-sectional study of subjects aged at least 50 years without ophthalmic symptoms recruited from a community clinic. All participants underwent standardized ocular examination and anterior-segment optical coherence tomography. Customized software was used to measure anterior chamber area (cross-sectional area bounded by the corneal endothelium, anterior surface of iris, and lens within the pupil) and anterior chamber volume (calculated by rotating the anterior chamber area ...
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  Mentions: Johns Hopkins University Sun Yat-Sen University National University of Singapore
5. Screening for Narrow Angles in the Singapore Population: Evaluation of New Noncontact Screening Methods
  
  Explore OphSource Sep 30 2008 Ophthalmology
  
  Purpose: To assess the screening effectiveness of 3 new noncontact devices, the scanning peripheral anterior chamber depth analyzer (SPAC) (Takagi, Nagano, Japan), which measures peripheral anterior chamber depth (ACD); IOLMaster (Carl Zeiss Meditec, Jena, Germany), which measures central ACD; and Visante anterior segment optical coherence tomography (AS-OCT) (Visante, Carl Zeiss Meditec, Dublin, CA), which images the angles, and to compare these instruments with gonioscopy in identifying people with narrow angles (NAs).Design: Cross-sectional, observational, community-based study.Participants: Phakic subjects aged ≥50 years without ophthalmic symptoms who were recruited from a community polyclinic in Singapore.Methods: All subjects underwent examination with ...
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  Mentions: Johns Hopkins University Singapore Eye Research Institute Carl Zeiss Meditec
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