1. Articles from Li-Lian Foo

    1-3 of 3
    1. Subgrouping of Primary Angle-Closure Suspects Based on Anterior Segment Optical Coherence Tomography Parameters

      Subgrouping of Primary Angle-Closure Suspects Based on Anterior Segment Optical Coherence Tomography Parameters

      Purpose To identify subgroups of primary angle-closure suspects (PACS) based on anterior segment optical coherence tomography (AS-OCT) and biometric parameters. Design Cross-sectional study. Participants We evaluated 243 PACS subjects in the primary group and 165 subjects in the validation group. Methods Participants underwent gonioscopy and AS-OCT (Carl Zeiss Meditec, Dublin, CA). Customized software (Zhongshan Angle Assessment Program, Guangzhou, China) was used to measure AS-OCT parameters. An agglomerative hierarchical clustering method was first used to determine the optimum number of parameters to be included in the determination of subgroups. The best number of subgroups was then determined using Akaike Information Criterion ...

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    2. Classification Algorithms Based on Anterior Segment Optical Coherence Tomography Measurements for Detection of Angle Closure

      Classification Algorithms Based on Anterior Segment Optical Coherence Tomography Measurements for Detection of Angle Closure

      Objective: A recent study found that a combination of 6 anterior segment optical coherence tomography (ASOCT) parameters (anterior chamber area, volume, and width [ACA, ACV, ACW], lens vault [LV], iris thickness at 750 μm from the scleral spur, and iris cross-sectional area) explain >80% of the variability in angle width. The aim of this study was to evaluate classification algorithms based on ASOCT measurements for the detection of gonioscopic angle closure.Design: Cross-sectional study.Participants: We included 2047 subjects aged ≥50 years.Methods: Participants underwent gonioscopy and ASOCT (Carl Zeiss Meditec, Dublin, CA). Customized software (Zhongshan Angle Assessment Program, Guangzhou ...

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    3. Comparison of scanning laser ophthalmoscopy and high-definition optical coherence tomography measurements of optic disc parameters

      Comparison of scanning laser ophthalmoscopy and high-definition optical coherence tomography measurements of optic disc parameters

      Objective To investigate the agreement between scanning laser ophthalmoscopy (Heidelberg retinal tomograph 3; HRT-3) and high-definition optical coherence tomography (HD–OCT) for measurements of optic nerve head (ONH) parameters. Methods As part of a population-based cross-sectional study, 913 consecutive Chinese subjects aged 40 years and older underwent HRT-3 and HD–OCT imaging of the ONH after pupillary dilation. Limits of agreement (LOA) derived from Bland–Altman analysis were calculated for ONH measurements. Results The mean age (±SD) of study participants was 54.2±7.2 years and 52.0% were men. The two instruments showed no difference in mean optic ...

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    1-3 of 3
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    1. (3 articles) National University of Singapore
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    Comparison of scanning laser ophthalmoscopy and high-definition optical coherence tomography measurements of optic disc parameters Classification Algorithms Based on Anterior Segment Optical Coherence Tomography Measurements for Detection of Angle Closure Subgrouping of Primary Angle-Closure Suspects Based on Anterior Segment Optical Coherence Tomography Parameters Advancing OCT Algorithmic Standardization Phase correction using programmable phase modulator (PPM) in optical coherence tomography Virtual reality simulator for vitreoretinal surgery using integrated OCT data Optical coherence tomography characteristics of the iris in Cogan-Reese syndrome Choroidal thinning in pseudoexfoliation syndrome detected by enhanced depth imaging optical coherence tomography Assessment of early occlusal caries pre- and post- sealant application—An imaging approach Quantification of peripapillary total retinal volume in pseudopapilledema and mild papilledema using spectral-domain optical coherence tomography In vivo analysis of the iris thickness by spectral domain optical coherence tomography Cornea characterization using a combined multiphoton microscopy and optical coherence tomography system