title: Nonpenetrating filtering procedures: viscocanalostomy and collagen wick.
abstract: Unroofing of Schlemm's canal without entering the anterior chamber has been performed previously to lower intraocular pressure. Initial results were good, but long-term results were discouraging, and the techniques were abandoned. Recently, two variations have surfaced. Visco canalostomy is a technique devised by Robert Stegmann of South Africa. The glaucoma drainage device (Collagen Wick) was initially introduced by Koslov in Russia. These techniques are described in this article.
authors.affiliation: Department of Ophthalmology, University of Utah Health Sciences Center, Salt Lake City, UT, USA.
authors.forename: A S
authors.initials: AS
authors.lastname: Crandall
mesh_terms: D001672:Biocompatible Materials; D003094:Collagen; D005355:Fibrosis / Q000517:prevention & control; D005901:Glaucoma / Q000601:surgery*; D020327:Glaucoma Drainage Implants; D006801:Humans; D007429:Intraocular Pressure; D012599:Sclerostomy / Q000379:methods*; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D003094:Collagen