Iridectomy
AI overview
An iridectomy is the surgical removal of part of the iris.
Key points
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Most frequently performed for closed-angle glaucoma and iris melanoma
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These procedures are most frequently performed in the treatment of closed-angle glaucoma and iris melanoma .
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In acute angle-closure glaucoma, surgical iridectomy has been superseded by Nd:YAG laser iridotomy due to safety
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In acute angle-closure glaucoma cases, surgical iridectomy has been superseded by Nd:YAG laser iridotomy , because the laser procedure is much safer.
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Nd:YAG laser iridotomy creates a hole in the iris to facilitate aqueous humor flow from posterior to anterior chamber
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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.
Treatment
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Commonly indicated for cataract surgery in glaucoma patients, combined cataract and glaucoma procedures, acute closed-angle glaucoma, posterior capsular tears with vitreous loss, anterior chamber IOL implantation, vitreoretinal procedures with silicone oil, and iris trauma
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Surgical iridectomy is commonly indicated and performed in the following cases:
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For silicone oil injection procedures, iridectomy is placed at 6 o'clock rather than the routine 11 to 1 o'clock position because silicone oil is less dense than water
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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.
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Peripheral iridectomy removes iris at its root, leaving pupillary margin and sphincter pupillae intact, used in glaucoma treatment
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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.
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Sector iridectomy removes a complete radial section from pupillary margin to root, leaving a key-hole pupil
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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.
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Optical iridectomy enlarges existing pupil or forms artificial pupil when natural pupil is ineffectual
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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.
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Preliminary iridectomy precedes cataract extraction to facilitate removal of cataractous lens
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A preliminary iridectomy , or preparatory iridectomy , is the surgical removal of part of the iris preceding cataract extraction .
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Antiphogistic iridectomy reduces intraocular pressure in inflammatory eye conditions
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An antiphogistic iridectomy is the surgical removal of part of the iris to reduce intraocular pressure in inflammatory conditions of the eye.
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Basal iridectomy includes the root of the iris
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A basal iridectomy is an iridectomy which includes the root of the iris.
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Stenopeic iridectomy removes a narrow slit or minute portion of iris, leaving sphincter pupillae intact
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A stenopeic iridectomy is the surgical removal of a narrow slit or a minute portion of the iris, leaving the sphincter pupillae muscle intact.
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Therapeutic iridectomy removes iris for cure or prevention of ocular disease
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A therapeutic iridectomy is the surgical removal of a portion of the iris for the cure or prevention of an ocular disease.
Red flags
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Surgical iridectomy in patients with high intraocular pressure carries risk of suprachoroidal hemorrhage with potential for expulsive hemorrhage
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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 .
AI-synthesized from the Wikipedia article “Iridectomy”. Not medical advice.
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| Iridectomy | |
|---|---|
Large peripheral iridectomy deforms pupil | |
| Other names | Surgical iridectomy |
| ICD-9-CM | 12.1 |
| MeSH | |
An iridectomy, also known as a surgical iridectomy or corectomy,[1] is the surgical removal of part of the iris.[2][1] These procedures are most frequently performed in the treatment of closed-angle glaucoma and iris melanoma.[1]
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 . 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.[3]
Surgical iridectomy is commonly indicated and performed in the following cases:[citation needed]
- 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.[2]
- A basal iridectomy is an iridectomy which includes the root of the iris.[2]
- 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.[2]
- 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.[2] It is used in the treatment of glaucoma.[1]
- A preliminary iridectomy, or preparatory iridectomy, is the surgical removal of part of the iris preceding cataract extraction.[2] It facilitates the removal of the cataractous lens.[1]
- 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.[2] A key-hole pupil is left by the removal of a wedge-shaped section of iris.[4]
- A stenopeic iridectomy is the surgical removal of a narrow slit or a minute portion of the iris, leaving the sphincter pupillae muscle intact.[2]
- A therapeutic iridectomy is the surgical removal of a portion of the iris for the cure or prevention of an ocular disease.[2]
- 1 2 3 4 5 Surgery Encyclopedia - "Iridectomy." Encyclopedia of Surgery: A Guide for Patients and Caregivers. Retrieved May 20, 2006.
- 1 2 3 4 5 6 7 8 9 Cline D; Hofstetter HW; Griffin JR. Dictionary of Visual Science. 4th ed. Butterworth-Heinemann, Boston 1997. ISBN 0-7506-9895-0
- ↑ Ou, Yvonne (5 July 2021). "Side Effects of Laser Iridotomy". www.brightfocus.org. University of California, San Francisco. Archived from the original on 23 February 2023. Retrieved 23 February 2023.
- ↑ Cassin, B. and Solomon, S. Dictionary of Eye Terminology. Gainesville, Florida: Triad Publishing Company, 1990.