Figure 3: Restoration of corneal clarity by cultivated oral mucosal epithelial transplantation (COMET). A. A 27 years old male suffered from acid burn OS during childhood, and pre-op best corrected vision was 20/300. B. COMET was performed in August 2009. Photo taken one week later. C. Photo taken one year after operation. D. Three years after operation, the cornea remained clear, and best corrected vision imporved to 20/30. However, peripheral corneal NV ingrowth from 3 to 6 O/C was noted.