World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0004951617
Reproduction Date:

Title: Iridectomy  
Author: World Heritage Encyclopedia
Language: English
Subject: Glaucoma surgery, Eye surgery, Trabeculectomy, Cataract surgery, Medicine/Did you know
Collection: Eye Surgery
Publisher: World Heritage Encyclopedia


ICD-9-CM 12.1

An iridectomy, also known as a surgical iridectomy or correctomy, is the surgical removal of part of the iris.[1][2] These procedures are most frequently performed in the treatment of closed-angle glaucoma and iris melanoma.[2]


  • Comparison with Nd:YAG laser iridotomy 1
  • Current indications 2
  • Types 3
  • See also 4
  • References 5

Comparison with Nd:YAG laser iridotomy

In acute angle-closure glaucoma cases, surgical iridectomy has been superseded by Nd:YAG laser iridotomy, because the laser procedure is much safer. Opening the globe for a surgical iridectomy in a patient with high intraocular pressure greatly increases the risk of suprachoroidal hemorrhage, with potential for associated expulsive hemorrhage. Nd:YAG laser iridotomy avoids such a catastrophe by laser created hole in the iris, which facilitates flow of aqueous humor from the posterior to the anterior chamber of the eye.

Current indications

Surgical iridectomy is commonly indicated and performed in the following cases:

  • Cataract surgery in a glaucoma patient
  • Combined procedure for cataract and glaucoma
  • Acute closed-angle glaucoma
  • Posterior capsular tears with vitreous loss
  • Implantation of anterior chamber IOL.
  • Vitreoretinal procedure involving injection of silicone oil. The location of the iridectomy in such cases is at 6'O Clock, as opposed to routine iridectomy done at 11 to 1'O Clock. This is because silicone oil is less dense than water.
  • Iris trauma


  • An antiphogistic iridectomy is the surgical removal of part of the iris to reduce intraocular pressure in inflammatory conditions of the eye.[1]
  • A basal iridectomy is an iridectomy which includes the root of the iris.[1]
  • An optical iridectomy is the surgical removal of part of the iris to enlarge the existing pupil, or to form an artificial pupil, when the natural pupil is ineffectual.[1]
  • A peripheral iridectomy is the surgical removal of a portion of the iris in the region of its root, leaving the pupillary margin and sphincter pupillae muscle intact.[1] It is used in the treatment of glaucoma.[2]
  • A preliminary iridectomy, or preparatory iridectomy, is the surgical removal of part of the iris preceding cataract extraction.[1] It facilitates the removal of the cataractous lens.[2]
  • A sector iridectomy, also known as a complete iridectomy or total iridectomy, is the surgical removal of a complete radial section of the iris extending from the pupillary margin to the root of the iris.[1] A key-hole pupil is left by the removal of a wedge-shaped section of iris.[3]
  • A stenopeic iridectomy is the surgical removal of a narrow slit or a minute portion of the iris, leaving the sphincter pupillae muscle intact.[1]
  • A therapeutic iridectomy is the surgical removal of a portion of the iris for the cure or prevention of an ocular disease.[1]

See also


  1. ^ a b c d e f g h i Cline D; Hofstetter HW; Griffin JR. Dictionary of Visual Science. 4th ed. Butterworth-Heinemann, Boston 1997. ISBN 0-7506-9895-0
  2. ^ a b c d Surgery Encyclopedia - "Iridectomy." Encyclopedia of Surgery: A Guide for Patients and Caregivers. Retrieved May 20, 2006.
  3. ^ Cassin, B. and Solomon, S. Dictionary of Eye Terminology. Gainesville, Florida: Triad Publishing Company, 1990.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.