Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Doyne honeycomb retinal dystrophy ?
    ### Response:
    Doyne honeycomb retinal dystrophy (DHRD) is a condition that affects the eyes and causes vision loss. It is characterized by small, round, white spots known as drusen that accumulate beneath the retinal pigment epithelium (the pigmented layer of the retina).
    