1. Articles from Yizhi Liu

    1-6 of 6
    1. Objective quantification of lens nuclear opacities using swept-source anterior segment optical coherence tomography

      Objective quantification of lens nuclear opacities using swept-source anterior segment optical coherence tomography

      Background/aims: The primary objective is to quantify the lens nuclear opacity using swept-source anterior segment optical coherence tomography (SS-ASOCT) and to evaluate its correlations with Lens Opacities Classification System III (LOCS-III) system and surgical parameters. The secondary objective is to assess the diagnostic performance for hard nuclear cataract. Methods: This cross-sectional study included 1222 patients eligible for cataract surgery (1222 eyes). The latest SS-ASOCT (CASIA-2) was used to obtain high-resolution lens images, and the average nuclear density (AND) and maximum nuclear density (MND) were measured by a custom ImageJ software. Spearman's correlations analysis was used to assess associations ...

      Read Full Article
    2. Accuracy of new generation intraocular lens calculation formulas in vitrectomized eyes

      Accuracy of new generation intraocular lens calculation formulas in vitrectomized eyes

      Purpose To compare the prediction accuracy of new intraocular lens (IOL) calculation formulas (Barrett Universal II (BUII), Emmetropia Verifying Optical (EVO), Kane and Ladas Super formula) and traditional formulas (Haigis, Hoffer Q, Holladay 1 and SRK/T) with Wang-Koch (WK) axial length (AL) adjustment in vitrectomized eyes. Design Retrospective consecutive case-series study. Methods 111 eyes of 111 patients underwent uneventful phacoemulsification and enVista MX60 implantation following vitrectomy were enrolled and divided into four groups according to whether the vitreous cavity was filled with silicone oil. The performance of each formula was evaluated with or without lens constant optimization. Results Before ...

      Read Full Article
    3. Comparison of radius of anterior lens surface curvature measurements in vivo using the anterior segment optical coherence tomography and Scheimpflug imaging

      Comparison of radius of anterior lens surface curvature measurements in vivo using the anterior segment optical coherence tomography and Scheimpflug imaging

      Background: To assess the radius of anterior lens surface curvature (RAL) measurements with anterior segment optical coherence tomography (AS-OCT) in comparison with Scheimpflug imaging. Methods: This prospective, cross-sectional study was carried out at Zhongshan Ophthalmic Center, Guangzhou, China. We enrolled 59 eyes, including 30 eyes from 30 cataractous volunteers (59 to 87 years) and 29 eyes from 29 young participants (19 to 49 years). After mydriasis, the RAL was measured automatically by the built-in software in the AS-OCT (CASIA 2). The Scheimpflug images were measured with the build-in caliper tool of the Scheimpflug camera (Pentacam), and RAL were further calculated ...

      Read Full Article
    4. In vivo detecting mouse persistent hyperplastic primary vitreous by Spectralis Optical Coherence Tomography

      In vivo detecting mouse persistent hyperplastic primary vitreous by Spectralis Optical Coherence Tomography

      To identify imaging characteristics of mouse persistent hyperplastic primary vitreous (PHPV) by Spectralis Optical Coherence Tomography (OCT), as well as to assess and compare the sensitivity and precision of OCT with color photography and Fundus Fluorescein Angiography (FFA) imaging in detecting mouse PHPV. NOTCH4 −/− C57BL/6J mice (224 eyes) aged from 3 months to 7 months were examined in this study. Color photography (CP), FFA and OCT imaging were utilized to examine vitreous cavity and retina of mouse eyes. Horizontal and radial OCT scan volume was centered on the optic nerve head. Hematoxylin and eosin (H&E) staining was performed ...

      Read Full Article
    5. Early changes in clear cornea incision after phacoemulsification: an anterior segment optical coherence tomography study

      Purpose: We aimed to investigate the ultrastructures of clear corneal incisions 24 hours after phacoemulsification using anterior segment optical coherence tomography (AS-OCT).Methods: Sixty eyes of 60 patients scheduled for cataract surgery were randomly selected. All eyes underwent the same phacoemulsification procedure carried out by one experienced surgeon. Two-plane temporal clear corneal tunnel incisions were performed. The same types of intraocular lens and implant system were used in all patients. Images of the ultrastructures of the corneal incisions were taken using AS-OCT before and 1 day after surgery.Results: Corneal thickness increased at the incision site after surgery in all ...
      Read Full Article
    6. Comparison of lens thickness measurements using the Anterior Segment Optical Coherence Tomography and A-scan ultrasonography

      Purpose: To assess lens thickness (LT) measurements with anterior segment optical coherence tomography (AS-OCT) in comparison with A-scan ultrasonography (A-scan US). Methods: 66 eyes of 48 phakic elderly volunteers aged 50+ years and 56 eyes of 56 young participants aged 18-40 years were enrolled in the study. LT was measured using the internal manual caliper tools in AS-OCT. The A-scan US measurements were based on the average of 10 consecutive automatic measurements. Reproducibility was assessed by 3 times measurements with AS-OCT and A-scan US independently by two observers who were masked to one another's results. Results: The failure rates ...
      Read Full Article
    1-6 of 6
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. Topics in the News

    1. (6 articles) Sun Yat-Sen University
    2. (1 articles) Queen's University Belfast
    3. (1 articles) University of Melbourne
    4. (1 articles) Wei Wang
    5. (1 articles) Bausch & Lomb
    6. (1 articles) Carl Zeiss Meditec
  3. Popular Articles

  4. Picture Gallery

    In vivo detecting mouse persistent hyperplastic primary vitreous by Spectralis Optical Coherence Tomography Comparison of radius of anterior lens surface curvature measurements in vivo using the anterior segment optical coherence tomography and Scheimpflug imaging Accuracy of new generation intraocular lens calculation formulas in vitrectomized eyes Objective quantification of lens nuclear opacities using swept-source anterior segment optical coherence tomography Systems and methods for reflectance-based projection-resolved optical coherence tomography angiography Health collaborations forged at CIIE begin to bear fruit Method for determining the topography of the cornea of an eye Optical measurement system using multicore optical fiber Fiber optic rotary joints and methods of using and manufacturing same High performance OCTA enabled by combining features of shape, intensity, and complex decorrelation A Novel 3D Segmentation Approach for Extracting Retinal Layers from Optical Coherence Tomography Images Assessing the Outcomes of Focused Heating of the Skin by a Long-Pulsed 1064 nm Laser with an Integrated Scanner, Infrared Thermal Guidance, and Optical Coherence Tomography