Figure 1. Micrographs of adherent human corneal epithelial cells after 24 h incubation with a contact lens. Corneal epithelial cells were incubated for 24 h in the presence of lotrafilcon A, directly out of its phosphate-buffered packaging solution and balafilcon A, directly out of its borate-buffered packaging solution. No lens represents the control cells, i.e., corneal epithelial cells grown in the absence of a contact lens.