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Proceedings Paper

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

Paper Details

Date Published: 12 January 1995
PDF: 5 pages
Proc. SPIE 2330, Lasers in Ophthalmology II, (12 January 1995); doi: 10.1117/12.199267
Show Author Affiliations
Karen Margaret Joos, Univ. of Miami School of Medicine and Vanderbilt Univ. (United States)
Jin-Hui Shen, Univ. of Miami School of Medicine (United States)
Jean-Marie A. Parel, Univ. of Miami School of Medicine and Hotel-Dieu Hospital (United States)
Pascal O. Rol, Univ. of Miami School of Medicine and Univ. Eye Clinic (Switzerland)


Published in SPIE Proceedings Vol. 2330:
Lasers in Ophthalmology II
Rosario Brancato; Adolf Friedrich Fercher; Pascal O. Rol; A. S. Melamed, Editor(s)

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