My son had his right eye removed at 18 months old due to bi-lateral retinoblastoma he had this condition and nobody knew! If when u take a photo of your child and rather than a red eye you see a white reflection, or your child's iris is darker than the other one or they have a squint plse plse plse do not waste time DO NOT let ur GP fob u off like ours did. U need ur child looked at ASAP. If u want to check out a good website it's 'CHECT' u can contact me if u have any questions xxxx