To access the data, click or select the words “Appendix 1.” Specificity of the triple HEC staining on epithelial cells. Observation of a cryo-applied lens before and after cutting off its anterior pole. Marking remains confined to the epithelium and does not mark the mass of anucleate fibers. The orange rectangle and the zoom showed the fluorescent band at the edge of the lens corresponding to epithelial cells that have not been cut.