CPT® Code 0622T

Trabeculostomy ab interno by laser is a specialized surgical procedure aimed at treating glaucoma, a condition that can lead to blindness if not managed effectively. The primary goal of this procedure is to reduce intraocular pressure (IOP), which is crucial in preventing the progression of glaucoma. This technique falls under the category of micro-invasive glaucoma surgery (MIGS), which is characterized by its minimal risk and high safety profile compared to traditional surgical methods. The ab interno approach involves creating a direct opening in the trabecular meshwork from within the anterior chamber of the eye, thereby enhancing the outflow of aqueous humor. This is achieved through the use of a laser that creates multiple microchannels, facilitating better drainage of fluid and ultimately lowering IOP. The procedure utilizes a 500 μm diameter probe and requires a small clear corneal incision of at least 0.8 mm. To maintain the integrity of the anterior chamber during the procedure, a viscoelastic substance is introduced. The use of an ophthalmic endoscope or goniolens allows for precise navigation and execution of the procedure. The laser application results in the formation of microbubbles, which may further assist in dilating Schlemm’s canal and enhancing the outflow pathway, thereby contributing to the overall effectiveness of the treatment.