Catherine Johnson, MD, MPH, recaps her article, “Impact of Selective Laser Trabeculoplasty on Diurnal IOP Fluctuation,” which was written with Barbara Wirostko, MD, FARVO, and featured in the November/December issue of Glaucoma Today. Home tonometry data are shedding light on SLT’s effect on IOP spikes in the months following laser treatment. This article reviews diurnal IOP fluctuation before and after SLT and discusses the implications of home tonometry in research.