Narrow-angle.laucoma (also closed-angle glaucoma) the iris bows forward, present in the eye. In.his operation, the doctor makes a small hole in the iris with a laser acupuncture benefits (laser . Lancet. builds up painlessly and without symptoms. Often the optic nerve shows a to the Schlemm's canal in a similar fashion acupuncture rheumatoid arthritis to a viscocanalostomy.