iridotomy
Pronunciation: /ɪˈrɪdɑtəmi/
Surgical creation of a small opening in the iris to improve aqueous humor drainage.
Full Definition
Iridotomy is a procedure that creates a small hole in the peripheral iris to treat or prevent angle-closure glaucoma. The opening allows aqueous humor to flow directly from the posterior chamber to the anterior chamber, bypassing the pupillary block mechanism that can cause dangerous pressure elevation. Modern iridotomy is typically performed using laser technology (laser peripheral iridotomy or LPI), though surgical iridotomy may be necessary in certain cases. The procedure is preventive in eyes with narrow angles and therapeutic in acute angle-closure situations.
Usage
Usage note: Distinguish from iridectomy (removal of iris tissue) and iridoplasty (reshaping without perforation).
In Context
- "Prophylactic laser iridotomy was recommended for the fellow eye following acute angle closure." — Treatment recommendation
- "The iridotomy site remained patent at six-month follow-up examination." — Clinical follow-up