How might you characterize a person with color blindness? why is the inner ear protected by the hardest bone in the body?

I know the first one:
The person might have trouble seeing shades of red, blue, and/or green. Color-sensitive pigments in the cones of the eye are absent. These inabilities to see certain colors ends up leading to the person seeing the colors in question as a mixture of the same shade.

So what is the question