Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to Meesmann corneal dystrophy ?
    ### Response:
    Meesmann corneal dystrophy can result from mutations in either the KRT12 gene or the KRT3 gene. These genes provide instructions for making proteins called keratin 12 and keratin 3, which are found in the corneal epithelium. The two proteins interact to form the structural framework of this layer of the cornea.
    