Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Retinoblastoma ?
    ### Response:
    These and other signs and symptoms may be caused by retinoblastoma or by other conditions. Check with a doctor if your child has any of the following:         -  Pupil of the eye appears white instead of red when light shines into it. This may be seen in flash photographs of the child.
    