Symptoms of Eye Cancer

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Executive Summary

Eye cancer is diagnosed based on its symptoms. The signs and symptom of eye cancer experienced by the individuals help describe a medical problem. Some of the common symptom of eye cancer include seeing spots, floating objects or squiggly lines, having trouble seeing, seeing flashes of light, having a dark spot on the iris, and losing part of the field of vision.

Signs and Symptom of Eye Cancer

People with intraocular melanoma mostly have no symptoms of eye cancer. Mostly, an ophthalmologist finds the melanoma during a regular eye examination. Painless loss of vision is the most common symptom.

People with eye cancer may experience the below-mentioned signs and symptoms ​1​. Sometimes people with eye cancer do not show any of the signs, or these signs may be caused by a medical condition other than cancer.

  • Seeing spots, floating objects or squiggly lines
  • Having trouble seeing
  • Seeing flashes of light
  • Having a dark spot on the iris. Unlike ciliary body and choroidal melanoma, iris melanoma can sometimes be seen because it looks like dark spots on the eye.
  • Losing part of the field of vision

If you are worried about one or more of the signs of eye cancer on this list, please talk to the doctor. 


  1. 1.
    Zheng J, Chen W, Huang D, et al. Ocular symptoms as the initial clinical manifestations in patients with extraocular tumors. Ann Transl Med. Published online March 2021:497-497. doi:10.21037/atm-21-830