In some forms of glaucoma, the drainage angle in the eye can be narrow meaning an iStent cannot be safely placed. In such circumstances, goniosynechiolysis can be performed using a very fine forceps (smaller than half a millimeter) to open up the drainage area. This allows control of eye pressure without the need for multiple eye drops or more invasive surgery.

The procedure is performed at the end of routine cataract surgery with no added discomfort, and only adds an extra ten minutes to the procedure.