The overall objective of this study is to optimise the corneal cross-linking standard
protocol in terms of a more economical use of the resource "medical personnel" and in terms
of increased patient participation. If it can be shown that the riboflavin necessary for
corneal cross-linking does not necessarily have to be applied directly on the cornea (as
currently performed by the nurses), but can also be applied in the inferior fornix (as it
would be performed by patients in the context of self-application), then it would be
conceivable to transfer this task from medical staff to the patients.