{{Short description|Surgical removal of part of the iris}} {{Infobox interventions | Name = Iridectomy | Image = Large iridectomy deforms pupil.jpg| Caption = Large peripheral iridectomy deforms pupil| ICD10 = | ICD9 = {{ICD9proc|12.1}} | MeshID = D032801 | synonyms = Surgical iridectomy| }}
An '''iridectomy''', also known as a '''surgical iridectomy''' or '''corectomy''',<ref name="Iridectomy"/> is the surgical removal of part of the iris.<ref name="Cline">Cline D; Hofstetter HW; Griffin JR. ''Dictionary of Visual Science''. 4th ed. Butterworth-Heinemann, Boston 1997. {{ISBN|0-7506-9895-0}}</ref><ref name="Iridectomy">[http://www.surgeryencyclopedia.com/Fi-La/Iridectomy.html Surgery Encyclopedia - "Iridectomy."] Encyclopedia of Surgery: A Guide for Patients and Caregivers. Retrieved May 20, 2006.</ref> These procedures are most frequently performed in the treatment of closed-angle glaucoma and iris melanoma.<ref name="Iridectomy"/> ==Comparison with Nd:YAG laser iridotomy== thumb|Ancient Hindu and modern iridectomy knives In acute angle-closure glaucoma cases, surgical iridectomy has been superseded by Nd:YAG laser '''iridotomy''', because the laser procedure is much safer.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 using a laser to create a hole in the iris, which facilitates flow of aqueous humor from the posterior to the anterior chamber of the eye.<ref name="Ou 2021">{{cite web |last=Ou |first=Yvonne |date=5 July 2021 |title=Side Effects of Laser Iridotomy |url=https://www.brightfocus.org/glaucoma/article/side-effects-laser-iridotomy |url-status=live |archive-url=https://web.archive.org/web/20230223201055/https://www.brightfocus.org/glaucoma/article/side-effects-laser-iridotomy |archive-date=23 February 2023 |access-date=23 February 2023 |website=www.brightfocus.org |publisher=University of California, San Francisco}}</ref>
==Current indications== Surgical iridectomy is commonly indicated and performed in the following cases:{{cn|date=January 2022}} * 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
==Types== * An '''antiphogistic iridectomy''' is the surgical removal of part of the iris to reduce intraocular pressure in inflammatory conditions of the eye.<ref name="Cline"/> * A '''basal iridectomy''' is an iridectomy which includes the root of the iris.<ref name="Cline"/> * 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.<ref name="Cline"/> * 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.<ref name="Cline"/> It is used in the treatment of glaucoma.<ref name="Iridectomy"/> * A '''preliminary iridectomy''', or '''preparatory iridectomy''', is the surgical removal of part of the iris preceding cataract extraction.<ref name="Cline"/> It facilitates the removal of the cataractous lens.<ref name="Iridectomy"/> * 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.<ref name="Cline"/> A ''key-hole pupil'' is left by the removal of a wedge-shaped section of iris.<ref name="Cassin">Cassin, B. and Solomon, S. ''Dictionary of Eye Terminology''. Gainesville, Florida: Triad Publishing Company, 1990.</ref> * A '''stenopeic iridectomy''' is the surgical removal of a narrow slit or a minute portion of the iris, leaving the sphincter pupillae muscle intact.<ref name="Cline"/> * A '''therapeutic iridectomy''' is the surgical removal of a portion of the iris for the cure or prevention of an ocular disease.<ref name="Cline"/>
==See also== * Eye surgery * Glaucoma surgery * List of surgeries by type
==References== {{Reflist}}
{{Eye surgery}}
Category:Eye surgery Category:Glaucoma