<prompt> Which of the following type of glaucoma is treated by Argon Laser Trabeculoplasty?Open angle glaucomaSecondary glaucomaAngle recession glaucomaAngle closure glaucoma  <response>: Laser trabeculoplasty is effective in the initial treatment of primary open-angle glaucoma. Application of laser either argon or frequency-doubled Q-switched Nd:YAG burns a goniolens to the trabecular meshwork facilitates aqueous out-flow by viue of its effects on the trabecular meshwork and Schlemms canal or cellular events that enhance the function of the meshwork. The pressure reduction usually allows decrease of medical therapy and postponement of glaucoma surgery. Ref: Salmon J.F. 2011. Chapter 11. Glaucoma. In P. Riordan-Eva, E.T. Cunningham, Jr. Eds, Vaughan Asburys General Ophthalmology, 18e. 