Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Acute zonal occult outer retinopathy ?
    ### Response:
    Acute zonal occult outer retinopathy (AZOOR) is a rare condition that affects the eyes. People with this condition may experience a sudden onset of photopsia (the presence of perceived flashes of light) and an area of partial vision loss (a blindspot). Other symptoms may include "whitening of vision" or blurred vision.
    