Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to achromatopsia ?
    ### Response:
    Achromatopsia results from changes in one of several genes: CNGA3, CNGB3, GNAT2, PDE6C, or PDE6H. A particular CNGB3 gene mutation underlies the condition in Pingelapese islanders.  Achromatopsia is a disorder of the retina, which is the light-sensitive tissue at the back of the eye.
    