Inclusion Criteria:  Patients must be 18 years and older at the time of the signing of the informed consent. There is no upper age limit. Scheduled for DSAEK or DMEK Ability to cooperate fairly well during the examinations Willing to participate in the study and capable of giving informed consent, which includes compliance with the requirements and restrictions in the informed consent form (ICF) and in this protocol.  Exclusion Criteria:  Contraindications for use of any medication (as listed in the approved SPC, e.g. allergy, pregnancy, breastfeeding) Pregnancy or possible pregnancy during the study period Preoperative macular edema and/or ongoing treatment for macular edema Re-transplantation In-operated glaucoma shunt / valve (e.g. Ahmed glaucoma valve) Aphakic eyes (eyes without a biological or artificial intraocular lens) Loss of central vision (expected visual acuity potential after surgery below 0.1 Snellen)