Lasertreatment fordecreasingintraocular pressure (IOP)
Lasertreatment fordecreasingintraocular pressure (IOP):
- Laser Iridotomy (Peripheral Iridotomy):It is a surgical procedure that is performed on an outpatient basis. In this method, laser is used to create a small hole in the iris, making it easier for thefluid (aqueous humor) to flow between the anterior andthe posteriorchambers of the eye. Thistechniqueis applicable in people who have narrow drainage angles or patients who suffer fromclosed-angleglaucoma.
- Selective Laser Trabeculoplasty (SLT): This method is used for the treatment of open-angle glaucoma. In this method, the wavelength is highly absorbed by melanin - selectively targets pigmented cells- while protecting trabecular meshwork. The primary biological response to this wavelength is the release of cytokines (a type of chemical intermediates) which leads to the activation and accumulation of macrophages (a type of cell). These changesstimulate the body’s natural mechanisms to enhance aqueous outflow and reduce IOP. Since the wavelengths used in this technique preserves surroundingtissue, it can be repeated several times if necessary.
- Endoscopic Cyclophotocoagulation (ECP): In this method, which is performed in the operating room,laser energy is applied to the ciliary processesthat produceaqueous humor to decrease the over production of the fluid thus reduce IOP. It is most commonly performed at the same time as cataract surgery.