High-frequency deep sclerotomy (HFDS) glaucoma surgery is a new ab interno procedure to lower the intraocular pressure in open-angleglaucoma. Using high-frequency energy, six small pockets are formed which significantly reduce the outflow resistance for aqueous humour. This article presents the impressive results of a long-term study about the HFDS glaucoma procedure and demonstrates its efficacy andsafety. The operation technique and the devices used for a successful HFDS glaucoma intervention are described step by step.