krypton_john, I have a restriction for colour blindness which restricts me to VFR and to airfields that, if controlled, are by radio rather than light (uncontrolled is OK). I was lead to believe that, should I wish to, I could get CPL and FI tickets but with similar restrictions. IR would not be possible.
If anybody is having trouble with the plates of coloured dots then you are able to take an alternative test that involves lights. This can give a very different result an may get you a pass. For example, I confuse red and green paint but not red and green lights. However I am no good with green and white lights and hence have the restriction. I think that you can only take the lantern test at main medical centres (eg Gatwick)