1. Aizhu Tao

    0 Comments Leave a Comment

    1-15 of 21 1 2 »
    1. Mentioned In 21 Articles

    2. Long scan depth optical coherence tomography on imaging accommodation: impact of enhanced axial resolution, signal-to-noise ratio and speed

      Long scan depth optical coherence tomography on imaging accommodation: impact of enhanced axial resolution, signal-to-noise ratio and speed
      Background Spectral domain optical coherence tomography (SD-OCT) was a useful tool to study accommodation in human eye, but the maximum image depth is limited due to the decreased signal-to-noise ratio (SNR). In this study, improving optical resolutions, speeds and the SNR were achieved by custom built SD-OCT, and the evaluation of the impact of the improvement during accommodation was investigated. Methods Three systems with different spectrometer designs, including two Charge ...
      Read Full Article
    3. Vertical and Horizontal Corneal Epithelial Thickness Profile Using Ultra-High Resolution and Long Scan Depth Optical Coherence Tomography

      Vertical and Horizontal Corneal Epithelial Thickness Profile Using Ultra-High Resolution and Long Scan Depth Optical Coherence Tomography
      Purpose To determine the vertical and horizontal thickness profiles of the corneal epithelium in vivo using ultra-long scan depth and ultra-high resolution spectral domain optical coherence tomography (SD-OCT). Methods A SD-OCT was developed with an axial resolution of ~3.3 m in tissue and an extended scan depth. Forty-two eyes of 21 subjects were imaged twice. The entire horizontal and vertical corneal epithelial thickness profiles were evaluated. The coefficient of ...
      Read Full Article
    4. Whole eye axial biometry during accommodation using ultra-long scan depth optical coherence tomography

      Whole eye axial biometry during accommodation using ultra-long scan depth optical coherence tomography
      Purpose To investigate changes of whole eye axial biometry during accommodation using ultra-long scan depth optical coherence tomography (UL-OCT). Design Prospective, observational case series. Methods Twenty-one adult subjects were enrolled. Using UL-OCT, the left eye of each subject was imaged with relaxed (0 D) and accommodative stimuli (+6 D). Full eye biometry included central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness, vitreous length and axial length (AL). Results ...
      Read Full Article
    5. Phacoemulsification Induced Transient Swelling of Corneal Descemet’s Endothelium Complex Imaged with Ultra-High Resolution Optical Coherence Tomography

      Phacoemulsification Induced Transient Swelling of Corneal Descemet’s Endothelium Complex Imaged with Ultra-High Resolution Optical Coherence Tomography
      Purpose Thickness changes of corneal sub-layers after phacoemulsification were investigated by spectral domain ultra-high resolution optical coherence tomography (UHR-OCT). Methods The corneas (n = 26) of 26 age-related cataract surgery patients were studied. UHR-OCT was used to evaluate the thickness of Descemets Endothelium Complex (DEC), stroma, Bowmans layer, epithelium, and full cornea at the center (CCT) before, one day after, and one week after surgery. Non-contact specular microscopy measured CCT, endothelial ...
      Read Full Article
    6. Ocular anterior segment biometry and high-order wavefront aberrations during accommodation

      Ocular anterior segment biometry and high-order wavefront aberrations during accommodation
      Purpose: To investigate the relationships between the ocular anterior segment biometry and the ocular high-order aberrations (HOAs) during accommodation by combined ultra-long scan depth optical coherence tomography (UL-OCT) and wavefront sensor. Methods: Thirty-five right eyes of young healthy subjects (21 women and 14 men; age: 25.6 3.1 years; spherical equivalent refractive error: -0.41 0.59 D) were enrolled. A custom-built UL-OCT and a wavefront sensor were combined ...
      Read Full Article
    7. High resolution OCT quantitative analysis of the space between the IOL and the posterior capsule during the early cataract post-operative period

      High resolution OCT quantitative analysis of the space between the IOL and the posterior capsule during the early cataract post-operative period
      Purpose: To quantitatively characterize the space between the intraocular lens (IOL) and the posterior capsule (IOL-PC space) during the early post-phacoemulsification period, using high resolution optical coherence tomography (OCT). Methods: Thirty eyes of 30 patients who underwent phacoemulsification were recruited and randomly divided into two groups. Acrysof Natural IQ IOLs were implanted in one group (n = 15), and Adapt-AO IOLs were implanted into the other (n = 15). A custom built ...
      Read Full Article
    8. Entire Thickness Profiles of the Epithelium and Contact Lens In Vivo Imaged With High-Speed and High-Resolution Optical Coherence Tomography

      Entire Thickness Profiles of the Epithelium and Contact Lens In Vivo Imaged With High-Speed and High-Resolution Optical Coherence Tomography
      Purpose: To test the feasibility of measuring the entire thickness profiles of the epithelium and contact lens (CL) in vivo, using high-speed and high-resolution spectral-domain optical coherence tomography (SD-OCT). Methods: A custom-built, long scan depth SD-OCT was developed based on a complementary metal oxide semiconductor (CMOS) camera, and the axial resolution was approximately 5.1 m in tissue. Five eyes of five subjects were imaged twice across the horizontal meridian ...
      Read Full Article
    9. Ultra-high resolution and long scan depth optical coherence tomography with full-phase detection for imaging the ocular surface

      Ultra-high resolution and long scan depth optical coherence tomography with full-phase detection for imaging the ocular surface
      ...faces determined from the images with a segmentation algorithm demonstrated excellent accuracy and precision. Aizhu Tao,1,3 Kristen A Peterson,2 Hong Jiang,1 Yilei Shao,1,3 Jianguang Zhong,1,4 Frank C Carey,2 Elias P Ros...
      Read Full Article
    10. Versatile optical coherence tomography for imaging the human eye

      Versatile optical coherence tomography for imaging the human eye
      We demonstrated the feasibility of a CMOS-based spectral domain OCT (SD-OCT) for versatile ophthalmic applications of imaging the corneal epithelium, limbus, ocular surface, contact lens, crystalline lens, retina, and full eye in vivo. The system was based on a single spectrometer and an alternating reference arm with four mirrors. A galvanometer scanner was used to switch the reference beam among the four mirrors, depending on the imaging application. An axial ...
      Read Full Article
    11. Simultaneous real-time imaging of the ocular anterior segment including the ciliary muscle during accommodatio

      Simultaneous real-time imaging of the ocular anterior segment including the ciliary muscle during accommodatio
      We demonstrated a novel approach of imaging the anterior segment including the ciliary muscle using combined and synchronized two spectral domain optical coherence tomography devices (SD-OCT). In one SD-OCT, a Complementary Metal-Oxide-Semiconductor Transistor (CMOS) camera and an alternating reference arm was used to image the anterior segment from the cornea to the lens. Another SD-OCT for imaging the ciliary muscle was equipped with a light source with a center wavelength ...
      Read Full Article
    12. The role of axial resolution of optical coherence tomography on the measurement of corneal and epithelial thicknesses

      The role of axial resolution of optical coherence tomography on the measurement of corneal and epithelial thicknesses
      Purpose: Our purpose was to investigate the role of the axial resolution of optical coherence tomography on the measurement of corneal and epithelial thickness by evaluating the repeatability and agreement among different optical coherence tomography (OCT) devices with different axial resolutions. Methods: Twenty right eyes of 20 healthy subjects (age: 22.3 1.3 years) and 18 eyes of 18 patients (age: 25.7 6.8 years) after laser in ...
      Read Full Article
    13. Quantitative analysis of the intraretinal layers and optic nerve head using ultra-high resolution optical coherence tomography

      Quantitative analysis of the intraretinal layers and optic nerve head using ultra-high resolution optical coherence tomography
      This study is designed to test the repeatability of the quantitative analysis of intraretinal layer thickness and cup-disc ratio of the optic nerve head using ultra-high resolution optical coherence tomography (UHR-OCT). Group A, containing 23 eyes of 12 healthy subjects, was imaged twice and group B, containing eight eyes of four subjects, was imaged three times. Intraretinal layers were segmented manually and the cup-to-disc ratio of the optic nerve head ...
      Read Full Article
    14. Automatic Segmentation of the Central Epithelium Imaged With Three Optical Coherence Tomography Devices

      Automatic Segmentation of the Central Epithelium Imaged With Three Optical Coherence Tomography Devices
      Purpose: The aim of this study was to investigate the feasibility of automatic segmentation of the central corneal thickness (CCT) and epithelial thickness (ET) of the human cornea obtained with different spectral domain optical coherence tomography (OCT) instruments. Methods: Ten left eyes from 10 healthy subjects with a mean age of 22.5+/-1.5 years participated in this study. A custom-built ultra-high resolution OCT (UHR-OCT) with a 3-[mu ...
      Read Full Article
    15. Age-Related Changes in Tear Menisci Imaged by Optical Coherence Tomography

      Age-Related Changes in Tear Menisci Imaged by Optical Coherence Tomography
      Purpose. To determine age-related changes of tear menisci in healthy subjects and to compare tear variables between age-matched normals and dry eye subjects. Methods. Anterior segment optical coherence tomography was used to measure upper and lower tear menisci in healthy subjects (n = 197, 8-83 years) and in age-matched dry eye patients (n = 38, 19-72 years). Measured tear variables included the height and area of the tear meniscus. Tear meniscus volumes ...
      Read Full Article
    16. 1-15 of 21 1 2 »
  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. About Aizhu Tao

    Aizhu Tao is with the School of Ophthalmology and Optometry at Wenzhou Medical College in China and also with the Bascom Palmer Eye Institute at the University of Miami Miller School of Medicine.