1. Articles from Eduardo Martinez-Enriquez

    1-4 of 4
    1. Estimation of intraocular lens position from full crystalline lens geometry: towards a new generation of intraocular lens power calculation formulas

      Estimation of intraocular lens position from full crystalline lens geometry: towards a new generation of intraocular lens power calculation formulas

      In a cataract surgery, the opacified crystalline lens is replaced by an artificial intraocular lens (IOL). To optimize the visual quality after surgery, the intraocular lens to be implanted must be selected preoperatively for every individual patient. Different generations of formulas have been proposed for selecting the intraocular lens dioptric power as a function of its estimated postoperative position. However, very few formulas include crystalline lens information, in most cases only one-dimensional. The present study proposes a new formula to preoperatively estimate the postoperative IOL position (ELP) based on information of the 3-dimensional full shape of the crystalline lens, obtained ...

      Read Full Article
    2. OCT-based full crystalline lens shape change during accommodation in vivo

      OCT-based full crystalline lens shape change during accommodation in vivo

      The full shape of the accommodating crystalline lens was estimated using custom three-dimensional (3-D) spectral OCT and image processing algorithms. Automatic segmentation and distortion correction were used to construct 3-D models of the lens region visible through the pupil. The lens peripheral region was estimated with a trained and validated parametric model. Nineteen young eyes were measured at 0-6 D accommodative demands in 1.5 D steps. Lens volume, surface area, diameter, and equatorial plane position were automatically quantified. Lens diameter & surface area correlated negatively and equatorial plane position positively with accommodation response. Lens volume remained constant and surface area ...

      Read Full Article
    3. Optical Coherence Tomography Based Estimates of Crystalline Lens Volume, Equatorial Diameter, and Plane Position

      Optical Coherence Tomography Based Estimates of Crystalline Lens Volume, Equatorial Diameter, and Plane Position

      Purpose : Measurement of crystalline lens geometry in vivo is critical to optimize performance of state-of-the-art cataract surgery. We used custom-developed quantitative anterior segment optical coherence tomography (OCT) and developed dedicated algorithms to estimate lens volume (VOL), equatorial diameter (DIA), and equatorial plane position (EPP). Methods : The method was validated ex vivo in 27 human donor (19–71 years of age) lenses, which were imaged in three-dimensions by OCT. In vivo conditions were simulated assuming that only the information within a given pupil size (PS) was available. A parametric model was used to estimate the whole lens shape from PS-limited data ...

      Read Full Article
    4. OCT-based crystalline lens topography in accommodating eyes

      OCT-based crystalline lens topography in accommodating eyes

      ustom Spectral Domain Optical Coherence Tomography (SD-OCT) provided with automatic quantification and distortion correction algorithms was used to measure anterior and posterior crystalline lens surface elevation in accommodating eyes and to evaluate relationships between anterior segment surfaces. Nine young eyes were measured at different accommodative demands. Anterior and posterior lens radii of curvature decreased at a rate of 0.78 ± 0.18 and 0.13 ± 0.07 mm/D, anterior chamber depth decreased at 0.04 ± 0.01 mm/D and lens thickness increased at 0.04 ± 0.01 mm/D with accommodation. Three-dimensional surface elevations were estimated by subtracting ...

      Read Full Article
    1-4 of 4
  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. (4 articles) Spanish National Research Council
    2. (4 articles) Susana Marcos
    3. (1 articles) Indiana University
    4. (1 articles) Soochow University
    5. (1 articles) The Chinese University of Hong Kong
    6. (1 articles) Hanyang University
    7. (1 articles) University of Rochester
    8. (1 articles) Haoyu Chen
    9. (1 articles) Jannick P. Rolland
    10. (1 articles) Michel Pâques
    11. (1 articles) Kate Grieve
    12. (1 articles) LighTopTech
  3. Popular Articles

  4. Picture Gallery

    OCT-based crystalline lens topography in accommodating eyes Optical Coherence Tomography Based Estimates of Crystalline Lens Volume, Equatorial Diameter, and Plane Position OCT-based full crystalline lens shape change during accommodation in vivo Estimation of intraocular lens position from full crystalline lens geometry: towards a new generation of intraocular lens power calculation formulas Optos, Bühler, Lumishore among latest Queen's Award winners Capabilities of Gabor-domain optical coherence microscopy for the assessment of corneal disease Postdoctoral Research Fellow Position within the PARIS High Resolution Retinal Imaging Group Evidence From Multimodal Imaging Effect Of Optic Disk—Fovea Distance On Measurements Of Individual Macular Intraretinal Layers In Normal Subjects Optical coherence tomography patterns of diabetic macular edema in a Saudi population Boston Medical Center Receives NIH Grant for Eye To Brain: Eye Biomarkers and Cognition Best Clinical Practice for Age-Related Macular Degeneration Imaging