Ginger - when I took DS for his 4yo needles the nurse at the GP did her own kind of 4yo check, and I think she only got the colourblind chart things out cos I mentioned it. We were being referred for his vision to an opthamologist anyway, and when I told them, she did the similar charts with him and he's well & truly colourblind LOL. Think he could only see numbers in 1 of them!

We recently did the MCHN 4yo check which was a bit different, but she didn't check his vision cos I told her we'd already seen the specialist etc. So I don't know if they have the colourblind tests there or not. They're pretty easy to find, so you can do it yourself.. here's the tests: Are You Color Blind? (thanks google! haha)