Fig. 2From: Multiple phototherapeutic keratectomy treatments in a Chinese pedigree with corneal dystrophy and an R124L mutation: a 20-year observational studyPhototherapeutic keratectomy (PTK) procedures. The images illustrate the subepithelial PTK surgical procedures. Top left: the corneal epithelium was immersed in 20% alcohol. Middle left: the epithelial flap was removed. Bottom left: Bowman’s layer and stroma of the cornea were ablated with laser. Top right: the central zone of the cornea appears transparent after ablation. Middle right: the epithelial flap was repositioned. Bottom right: a bandage contact lens was appliedBack to article page