“…The cytokines in the tears of the KC patients have already been studied from various points of view [1,5,6,14,15,16,17,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36]. Nevertheless, there is a dearth of data related to the course of the cytokine changes in tears during the individual KCR types of the primary KC form [1,2,3,9,10,11,12,13,15,17,19,20,37,38,39,40,41,42,43].…”