<prompt> Argon laser trabeculoplasty is indicated inAphakic glaucomaNeovascular glaucomaClosed angle glaucomaOpen angle glaucoma  <response>: Indications for Argon laser trabeculoplasty Uncontrolled open angle glaucoma despite medical therapy Noncompliance of medical therapy and non-availability of ALT Eyes with advanced disease - high IOP, advanced cupping and advanced field lossMechanism of ALT - Increasing outflow facility by producing collagen shrinkage on the inner aspect of trabecular meshwork and opening intratrabecular spaces. Regime consists of 50 spots on the anterior half of the trabecular meshwork over 1800degree Complications - Inflammation, hemorrhage, uveitis,peripheral anterior synechiae and reduced accomodationRefer: AH Khurana, Comprehensive Textbook of Ophthalmology,5thedition,pg no: 236 