A survey of glaucoma laser parameters and practices was mailed to all United States members of the American Society of Cataract and Refractive Surgery (ASCRS) in March 1999. Approximately 19% (947) of the 5100 surveys were returned. The survey assessed parameters used for laser trabeculoplasty, laser iridotomy, and gonioplasty. Respondents also answered questions about the application of these laser therapies in a wide variety of clinical situations. The results were cross-tabulated by age, number of laser trabeculoplasties performed per month, fellowship training in glaucoma, and geographic location.