Trabeculoplasty is a treatment for glaucoma plastic

Plastic

A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...

 surgery. It is done on a argon laser equipped slit lamp, using a Goldmann gonioscope lens mirror. The laser is directed to the trabecula

Trabecula

A trabecula is a small, often microscopic, tissue element in the form of a small beam, strut or rod, generally having a mechanical function, and usually composed of dense collagenous tissue They can be composed of other materials; in the heart, for example, muscles such as trabeculae carneae...

r meshwork. Specifically, argon laser is used so that small openings in the eye's trabecular meshwork, from which the aqueous humor can drain better - this helps reduce intraocular pressure caused by open-angle glaucoma.