Figure 1: Corneal flap margin and adjacent regions photographed by slit-lamp biomicroscopy at 6 months after surgery. Smooth, narrow, moderately reflective circumferential bands in the control right eye (a) and the BCL-treated left eye (b) of a patient. Smooth, slightly wider circumferential bands in the BCL-treated right eye (c) and the non-BCL-treated left eye (d) of a patient.