title: Imaging of Ocular Angle Structures with Fourier Domain Optical Coherence Tomography.
abstract: BACKGROUND
  Imaging of the Schlemm's Canal is complicated by the small physiological size and the location several hundred microns beneath the sclera. Noninvasive imaging of Schlemm's canal and Trabecular Meshwork (TM) in vivo with Fourier Domain Optical Coherence Tomography (FD OCT) can provide clinicians with a powerful tool to visualize ocular angular structures crucial for glaucoma management.
  
  
  OBJECTIVE
  To investigate the appearance of Schlemm's canal and TM on FD OCT images.
  
  
  METHODS
  FD OCT images of the Schlemm's canal and TM were obtained with three different wavelengths using prototype FD OCT systems in a normal volunteer. FD OCT images using the 1310 nm wavelength prototype were obtained in three representative cases of glaucoma surgery performed on angle structures.
  
  
  RESULTS
  The longer imaging depth and deeper tissue penetration of the 1310 nm system provided the clearest image of the TM and Schlemm's canal in the normal patient. In case 1, images pre- and post-trabectome surgery clearly showed the location and appearance of TM. In case 2, images post-canaloplasty surgery showed the location and appearance of Schlemm's canal. In case 3, images pre- and post-trabeculotomy surgery further confirms the appearance and location of the Schlemm's canal and TM.
  
  
  CONCLUSIONS
  Operating wavelength of the FD OCT system and exact location of the scan across different meridians minimally affects the appearance of the ocular anatomy. The postoperative images of three angle glaucoma surgeries confirmed the location of Schlemm's canal and TM. How to cite this article: Asrani S, Young M, Xu J, Sarunic MV. Imaging of Ocular Angle Structures with Fourier Domain Optical Coherence Tomography. J Current Glau Prac 2013;7(2):85-87.
authors.affiliation: Professor, Department of Ophthalmology, Duke Eye Center, Duke University, Durham, North Carolina, USA.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Asrani
authors.affiliation: Biomedical Engineer, Department of Ophthalmology and Visual Sciences, University of British Columbia, British Columbia, Canada.
authors.forename: Mei
authors.initials: M
authors.lastname: Young
authors.affiliation: PhD Candidate, School of Engineering Science, Simon Fraser University British Columbia, Canada.
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.affiliation: Associate Professor, School of Engineering Science, Simon Fraser University British Columbia, Canada.
authors.forename: Marinko
authors.initials: M
authors.lastname: V Sarunic
keywords: Anterior eye segment; Optical coherence tomography; Trabecular meshwork.