Epi-on PiXL for the Treatment of Progressive Keratoconus.

After local anaesthetics, the keratoconus cornea is soaked in Riboflavin by repeated topical application during 10 minutes. A Riboflavin soaked sponge is used to lightly disrupt the epithelium tight junctions, without epithelium debridement. The cornea is illuminated with PiXL under 16:40 minutes during continuously delivery of humidified high oxygen via specific oxygen googles. The UV-dosage is individually customized based upon Kmax; for \< 45 Diopters (D) 7.2J/cm\^2 will be used; for 45-50D 10J/cm\^2 will be used; for \> 50D 15 J/cm\^2 will be used.