The Causes of Ocular Melanoma are Unknown, But There are Known Risk Factors

According to the Mayo Clinic, the risk factors for primary ocular melanoma include:

  • Eye color
  • Genetic disposition
  • Sun exposure

The Clinic also recommends having a doctor examine you if you find a dark spot on your iris that is enlarging. Many doctors believe that skin and eye melanomas start from a mole (nevus), which is a noncancerous tumor of pigment cells.