Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Iridocorneal endothelial syndrome ?
    ### Response:
    What causes iridocorneal endothelial (ICE) syndrome? The cause of this disease is unknown. However, it has been theorized that a viral infection, such as Herpes simplex virus (HSV) or Epstein-Barr virus (EBV) may be the trigger that causes the cornea to swell.
    