CPT® Code 66761

Iridotomy and iridectomy are laser surgical procedures primarily performed to treat closed-angle glaucoma, a condition where the drainage angle of the eye becomes blocked, leading to increased intraocular pressure. The procedure involves creating an opening in the iris to facilitate the outflow of aqueous humor, thereby lowering intraocular pressure. Prior to the surgery, patients receive an intraocular pressure-lowering eye drop, administered one hour before the procedure and again immediately before the surgery. This preparation is crucial as it helps to manage the pressure within the eye. Additionally, eye drops are used to constrict the pupil, which aids in the precision of the laser application. During the procedure, the patient is positioned at the laser apparatus, and an iridotomy contact lens is placed on the upper part of the eye. This lens serves to magnify the view and enhance the accuracy of the laser beam projection. The laser is typically directed at either the 11 o'clock or 1 o'clock position on the iris, and laser pulses are applied until a hole is formed. Once the laser has successfully penetrated the iris, aqueous fluid begins to flow from the anterior chamber, which is essential for reducing intraocular pressure. After the procedure, a gonioscope is used to examine the anterior chamber angle, ensuring that the created hole is sufficiently wide to allow for adequate drainage of aqueous humor. It is important to note that multiple sessions may be necessary to achieve optimal drainage, and each session is reported separately under the CPT® code 66761.