DS2 is 3 and can't do his colours yet. He knows blue and yellow but nothing else. Given that my granddad was colourblind, should I try and pursue this? Or am I being OTT and just let him learn in his own time. He's deaf and has other physical developmental issues too, but I'm not sure if these could be linked.
If you have or know a colourblind child, when and how was it diagnosed?