Editing Glaucoma (section)

===Laser===
Argon laser [[trabeculoplasty]] (ALT) may be used to treat open-angle glaucoma, but this is a temporary solution, not a cure. A 50-μm argon laser spot is aimed at the trabecular meshwork to stimulate the opening of the mesh to allow more outflow of aqueous fluid. Usually, half of the angle is treated at a time. Traditional laser trabeculoplasty uses a thermal argon laser in an [[argon]] laser trabeculoplasty procedure.

Nd:YAG laser peripheral iridotomy (LPI) may be used in patients susceptible to or affected by angle closure glaucoma or [[pigment dispersion syndrome]]. During laser iridotomy, laser energy is used to make a small, full-thickness opening in the iris to equalize the pressure between the front and back of the iris, thus correcting any abnormal bulging of the iris. In people with narrow angles, this can uncover the trabecular meshwork. In some cases of intermittent or short-term angle closure, this may lower the eye pressure. Laser iridotomy reduces the risk of developing an attack of acute angle closure. In most cases, it also reduces the risk of developing chronic angle closure or of adhesions of the iris to the trabecular meshwork. [[Computational fluid dynamics]] (CFD) simulations have shown that an optimal iridotomy size to relieve the pressure differential between the anterior and posterior side of the iris is around 0.1&nbsp;mm to 0.2&nbsp;mm.<ref>{{Cite journal |last1=Cai |first1=Jian-Cheng |last2=Chen |first2=Yan-Ling |last3=Cao |first3=Yue-Hong |last4=Babenko |first4=Andrii |last5=Chen |first5=Xi |date=2022-02-01 |title=Numerical study of aqueous humor flow and iris deformation with pupillary block and the efficacy of laser peripheral iridotomy |url=https://www.sciencedirect.com/science/article/pii/S0268003322000092 |journal=Clinical Biomechanics |language=en |volume=92 |pages=105579 |doi=10.1016/j.clinbiomech.2022.105579 |pmid=35085976 |s2cid=246361118 |issn=0268-0033}}</ref> This coincides with clinical practice of LPI where an iridotomy size of 150 to 200 microns is commonly used. However, larger iriditomy sizes are sometimes necessary.