In vitro examination of the anterior chamber angle with a gradient-index (GRIN) lens endoscope

Karen M.M.D. Joos, Jinhui Shen, Jean Marie Parel, Pascal O. Rol

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The cloudy cornea in primary infantile glaucoma may contraindicate a goniotomy if a view of the anterior chamber angle is not obtainable through the operating microscope. The purpose of this study was to determine if a gradient-index (GRIN) endoscope was capable of improving the imaging of the anterior chamber angle structures in vitro. The anterior chambers of cadaver porcine eyes were deepened with a viscoelastic material. The GRIN lens endoscope entered the anterior chamber through a corneal incision near the limbus. The anterior chamber structures including the pectinate ligaments in the angle were clearly visualized on a video screen as the endoscope was advanced into the anterior chamber angle. The amount of illumination was automatically controlled. A low OH silica fiber having a core diameter of 100 microns and delivering 10 mJ of Holmium:YAG energy was inserted into the endoscope. Due to the low amount of energy, the pectinate ligaments were inconsistently cut. The specimens were examined with a dissecting microscope, fixed in formalin, and processed for light microscopy. A thin endoscope allows intraoperative examination of anterior segment structures when a cloudy cornea is present. Therefore, it may become a useful instrument for performing a goniotomy in primary infantile glaucoma when direct visualization of the anterior chamber angle is not possible with a goniotomy lens.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsRosario Brancato, Adolf F. Fercher, A.S. Melamed, Pascal O. Rol
Pages42-46
Number of pages5
StatePublished - Dec 1 1995
EventLasers in Ophthalmology II - Lille, Fr
Duration: Sep 9 1994Sep 10 1994

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2330
ISSN (Print)0277-786X

Other

OtherLasers in Ophthalmology II
CityLille, Fr
Period9/9/949/10/94

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Joos, K. M. M. D., Shen, J., Parel, J. M., & Rol, P. O. (1995). In vitro examination of the anterior chamber angle with a gradient-index (GRIN) lens endoscope. In R. Brancato, A. F. Fercher, A. S. Melamed, & P. O. Rol (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (pp. 42-46). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 2330).