Signs and symptoms of eye cancers may be difficult to distinguish from symptoms for other conditions. Signs and symptoms of  intraocular melanoma, the most common form of adult eye cancer, include:

• Reduced vision
• Floaters (spots that drift into the field of vision)
• Flashes of light
• Reduction in visual field (the patient loses part of the field of sight)
• A dark spot on the iris that increases in size

Individuals who experience any of these signs and symptoms should promptly notify their ophthalmologist (a physician who specializes in diseases that affect the eye). Vision trouble is usually the first symptom of intraocular lymphoma. This condition is not usually accompanied by pain and typically affects both eyes.

Vision trouble is usually the first symptom of intraocular lymphoma, a very rare form of eye cancer. This condition is not usually accompanied by pain, and typically affects both eyes.

Signs and symptoms of retinoblastoma, which mainly affects young children, may include:

• Unusual appearance of the eye, in which the pupil turns white rather than red in response to direct light (leukokoria). This may be visible in an infant after a flash photograph is taken.
  
  
• The eyes look in different directions (strabismus).
  
  
• Vision problems.
  
  
• Eye pain.
  
  
•  The white part of the eye (sclera and conjunctiva) appears red.
  
  
• The pupil does not become smaller when exposed to intense light.