Re Colormax lenses:
There are many variations of lenses that will "help you pass the Ishihara" but they ARE ALL IRRELEVANT. Passing the Ishihara or any other colour vision test, has no bearing or relevance to whether or not you can fly an (any) aircraft competently and safely. To get drawn into discussing these lenses only reinforces the false theory that colour matters in the task of flying safely. I have tried several such lenses out of curiosity, and they are fun to try but useless in normal daily activities.