a method for marking coagulation sites on a retina by application of a light source including : projecting a serial spot sequence from a sequential , one - dimensional series of spots on the retina , wherein the individual spots indicate the coagulation sites ; waiting for confirmation of the sequence of individual spots ; after confirming , recalculating an automated sequence of steps having a further serial spot sequence and projecting them on the retina according to the first step ; and subsequent repeating of the second and third steps . also , a system for coagulating the retina , having an imaging diagnostic unit , a therapy beam for coagulating coagulation sites , a pilot beam for marking the coagulation sites by a spot sequence , a beam deflecting unit for generating the spot sequence and for positioning the therapy beam , an electronic control unit for controlling the above devices , a software interface , and an interactive interface .